ÔN THI TỐT NGHIỆP 2023 (TÌM MA TRẬN VÀ ĐÁP ÁN ĐÚNG)
Question 1. A. thank
B. thick
C. that
D. thing
Phụ âm (consonant)
Question 2. A. miss
B. child
C. sign
D. mind
Nguyên âm (vowel)
Question 3. A. balloon
B. spirit
C. panda
D. island
Trọng âm của từ có 2 âm tiết (two syllable words – nouns)
Question 4. A. disappoint 3
B. satisfy 1
C. educate 1
D. recognise 1
Trọng âm của từ có 3 âm tiết (three syllable words – verbs)
Question 5. The 31st SEA Games, ______ in Vietnam in 2022, left a deep impression on the participants.
A. were held
B. held
C. holding
D. were holding
Mệnh đề quan hệ rút gọn (wh + be + P2 = P2) (reduced clauses)
Question 6. Life in the city is ______ than life in the countryside.
A. exciting
B. most exciting
C. the most exciting
D. more exciting
So sánh (So sánh hơn) (comparatives)
Question 7.

Mạo từ/không mạo từ (articles/no article)
Question 11. Our school ______ has had a record of 10,000 visits this week.
A. software
B. email
C. hardware
D. website
Từ vựng (vocabulary)
Question 12. As a foreign language student, you should learn how to __ new words in the dictionary.
A. look down
B. write off
C. look up
D. take off
Cụm động từ (Phrasal Verbs)
Question 13. He refused ______ overtime to spend the evening with his family.
A. to work
B. work
C. to working
D. working
Dạng của động từ (verb forms): To V
Question 14. The other members in the group showed their dissatisfaction with Sarah's not pulling her
______ in the project.
A. muscle
B. weight
C. head
D. teeth
Từ vựng: Thành ngữ (idiom): not pull one's weight = not work as hard as
Question 15. The students ______ noisily when the teacher came into the classroom.
A. were talking
B. talk
C. talked
D. are talking
Phối thì (tenses: QKĐ_QKTD)
Question 16. David still ______ contact with many of his old school friends.
A. catches
B. brings
C. takes
D. keeps
Từ vựng (Cụm từ cố định: vocabulary-collocation)
Question 17. She hopes that after her book comes out, it ______ by many people.
A. reads
B. will read
C. was reading
D. will be read
Bị động (Passive voice in the future simple tense: TLĐ)
Question 18. Children often like wearing ______ colours on Tet holidays.
A. brightly
B. brighten
C. brightness
D. bright
Từ loại (vocabulary-word forms: tính từ + danh từ)
Question 19. The band at that time was immensely popular and often played to a(n) ___ crowd of about
5,000.
A. probability
B. capability
C. capacity
D. ability
Từ vựng (từ cùng trường nghĩa: vocabulary)
Question 20. Tom is in a restaurant.
- Waiter: “Would you like to order now?” - Tom: “ ______. A beefsteak and a Coke, please?'
A. Yes, I will go now
B. Yes, sure
C. No, thanks
D. Help yourself
CNGT (Invitations: đáp ại lời mời)
Question 21. Jack and Linh are talking about technology.
- Jack: “I think robots will replace teachers in the near future."
- Linh: “ ______, We still need teachers to inspire students.”

A. I don't think so
B. It's true
C. You're right
D. I couldn't agree more
CNGT (Expressing opinion: Bày tỏ quan điểm, thái độ)
Question 22. It is important that the government should take action to preserve the historic building.
A. protect
B. destroy
C. save
D. maintain
Trái nghĩa (từ đơn)
Question 23. 1 have to postpone my family holiday until next month because I am now up to my ears in
work.
A. having an ear infection
B. having so much work to do
C. having nothing much to do
D. having my ears checked
Trái nghĩa (cụm từ/thành ngữ)
Question 24. You should use your own judgment; don't trust everything you read online.
A. explain
B. suggest
C. believe
D. decide
Đồng nghĩa (từ đơn)
Question 25. Most foreign visitors are attracted by the spectacular scenery of Ha Long Bay.
A. healthy
B. wealthy
C. familiar
D. wonderful
Đồng nghĩa (từ đơn)
Question 26. It is compulsory for all road users to follow the traffic rules.
A. All road users needn't follow the traffic rules. B. All road users shouldn't follow the traffic rules.
C. All road users must follow the traffic rules.
D. All road users may follow the traffic rules.
Động từ khuyết thiếu (Modal verb + V)
Question 27. I last heard from him five years ago.
A. I heard from him for five years.
B. I didn't hear from him for five years.
C. I haven't heard from him for five years.
D. I have heard from him for five years.
Các thì (Quá khứ đơn và hiện tại hoàn thành)
Question 28. “Where are you going this weekend?” asked my sister.
A. My sister asked me where I am going that weekend.
B. My sister asked me where am I going that weekend.
C. My sister asked me where I was going that weekend.
D. My sister asked me where was I going that weekend.
Câu tường thuật/gián tiếp (Reported speech with Wh questions: TT với câu hỏi có từ để hỏi)
Question 29. Most of the language used by teenagers today, especially in emails and text messages, is

Lỗi sai về từ tham chiếu (đại từ/tính từ tham chiếu với chủ ngữ/tân ngữ đc nhắc đến)
Question 32. Nam is not here. He can't give you any advice.
A. If only Nam had been here, he could have given you some advice,
B. If Nam were here, he couldn't give you any advice.
C. Provided that Nam is here, he can't give you any advice.
D. If Nam were here, he could give you some advice. Điều kiện/điều ước (Conditional sentences: ĐK 2
trái ngược so với Hiện tại)/./
ÔN THI TỐT NGHIỆP 2023 (TÌM MA TRẬN VÀ ĐÁP ÁN ĐÚNG)
Số 01
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs
from the other three in pronunciation in each of the following questions.
Question 1. A. author
B. weather
C. method
D. ethnic
Question 2. A. shown
B. flown
C. grown
D. crown
Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in
the position of primary stress in each of the following questions.
Question 3. A. struggle
B. certain
C. action
D. police
Question 4. A. uncertain
B. arrogant
C. familiar
D. impatient
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following
questions
Question 5: The authority has a message for people_____________ by the traffic
A. delayed
B. delaying
C. who delayed
D. to be delayed

Question 6: Of the two sisters, Linda__________.
A. is beautiful
B. the most beautiful C. is more beautiful D. is so beautiful as
Question 7: Justin Bieber will release an album____________
A. after he had finished his tour around Europe B. by the time he finished his tour around Europe
C. when he will finish his tour around Europe
D. as soon as he has finished his tour around Europe
Question 8: She was so involved __________the book that she didn't know the burglary in her living room.
A. at
B. in
C. to
D. on
Question 9: Mary will have a presentation on global warming tomorrow____________?
A. isn't she
B. won't she
C. will she
D. wouldn't she
Question 10: Vinfast is___________ first Vietnamese car brand to enter global markets
A. a
B. no article
C. the
D. an
Question 11: The increase in population and the number of __________ has caused traffic jams in many
cities
A. vehicles
B. residents
C. museums
D. restaurants
Question 12: The weather was perfect when we ____________ but it was raining when we got back.
A. brought about
B. got on
C. turned up
D. set off
Question 13: The guest on our program will be the youngest____________ the quiz.
A. to win
B. that wins
C. who is winning
D. winning
Question 14: Play this song and he will quickly fall asleep. This is the one he learns at his _________knee
A. cousin's
B. sisters'
C. mother's
D. grandmother's
Question 15: While Peter _____________ last night, he got a nightmare.
A. slept
B. had slept
C. is sleeping
D. was sleeping
Question 16: They ___________ into laughter at the sight of his clown costume.
A. poured
B. burst
C. cried
D. joined
Question 17: I wanted ____________ by the head of the company, but it was impossible.
A. to see
B. to be seen
C. seeing
D. being to see
Question 18: She teaches the students to have respect for the different races and appreciate the
____________ of their cultures
A. diverse
B. diversely
C. diversified
D. diversity
Question 19: Passengers are advised to take all their personal________ with them when they leave the
plane
A. belongings
B. estates
C. items
D. baggage
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes each of the
following exchanges
Question 20: Peter in the supermarket
- Salesperson: “Would you like to buy now?”- Customer: “_____” a kilo of beef, please.
A. No, thanks
B. Yes, sure
C. help yourself
D. OK
Question 21: Jenny and Jimmy are talking about university education.
Jenny: "I think having a university degree is the only way to succeed in life."
Jimmy: "___________. There were successful people without a degree."
A. That's all right
B. That's life
C. I don't quite agree D. I can't agree more
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the
underlined word(s) in each of the following questions.
Question 22: The senator defended his opponent's policies in a televised speech.
A. praised
B. supported
C. attacked
D. attached
Question 23: He didn't bat an eyelid when he realized he failed the exam again.
A. showed surprise
B. didn't care
C. didn't want to see
D. wasn't happy
Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the
underlined word in each of the following questions.
Question 24: The speaker paused. He hesitated to answer the direct question raised by the audience.
A. decided
B. continued
C. determined
D. wavered
Question 25: By being thrifty and shopping wisely, housewives in the city can feed an entire family on as
little as 500.000 VND a week.
A. sensible
B. economical
C. miserable
D. luxurious

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning  to
each of the following questions.
Question 26: She probably buys this house next week.
A. She doesn't have to buy this house next week.
B. She may buy this house next week.
C. She should buy next house next week.
D. She must buy this house next week.
Question 27: ‌The‌‌last‌‌time‌‌I‌‌saw‌‌her‌‌was‌‌three‌‌years‌‌ago.‌
A. ‌I‌‌have‌‌not‌s‌ een‌‌her‌‌for‌‌three‌‌years.‌
B. ‌About‌‌three‌‌years‌‌ago,‌‌I‌‌used‌‌to‌‌meet‌‌her.‌
C. ‌I‌‌have‌‌often‌‌seen‌‌her‌‌for‌‌the‌‌last‌‌three‌‌years.‌ D. ‌I‌s‌ aw‌‌her‌‌three‌‌years‌‌ago‌‌and‌‌will‌‌never‌‌meet‌‌her‌.
Question 28: “What are you doing at 8 p.m yesterday.” asked my brother.
A. My brother asked me what I am doing at 8 p.m the previous day.
B. My brother asked me what am I doing at 8 p.m the previous day.
C. My brother asked me what I was doing at 8 p.m the previous day.
D. My brother asked me what was I doing at 8 p.m the previous day.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction
in each of the following questions.‌
Question 29: Mary is very indigenous so she is always the highest ranked student in the class.
A. indigenous
B. is
C. the
D. ranked
Question 30: Last night, she stays up so late to study for her exams.
A. stays
B. so
C. to study
D. her
Question 31: Sarah was not the best speaker in the class, but they had the ability to convey the good
feelings.
A. not the best
B. but
C. they
D. convey
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair
of sentences in the following questions.
Question 32: Peter does not have money. He can't buy a new house.
A. As long as he had money, he can't buy a new house.
B. If only he the had bought a new house.
C. If Peter had money, he couldn't buy a new house.
D. If Peter had money, he could buy a new house.

ÔN THI TỐT NGHIỆP 2023 (TÌM MA TRẬN VÀ ĐÁP ÁN ĐÚNG)
Số 02
Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
Question 1: That sort of extreme diet is not ______ over a long period.
A. sustainably
B. sustainability
C. sustainable
D. sustain
Question 2: The boys were at home yesterday, _______?
A. didn't they
B. weren't they
C. were they
D. did they
Question 3: The students _______ to be at school by the teacher at 8:00 am yesterday.
A. tell
B. told
C. have told
D. were told
Question 4: He started his journey____________carefully to find a suitable job in a city.
A. Have planned
B. planned
C. planning
D. which planned
Question 5: I felt ___________than I had expected when I saw him.
A. more confident
B. most confident
C. as confident
D. confident
Question 6: My mother goes to church in __________morning.
A. Ø
B. an
C. the
D. a
Question 7: When I was walking to school this morning, I saw Tim _________a bike with Jane .
A. riding
B. to ride
C. rode
D. riden
Question 8: Everybody in the house woke up when the burglar alarm_______.
A. went up
B. went off
C. came across
D. came off
Question 9: While my father_______ a film on TV, my mother was cooking dinner.
A. watched
B. was watching
C. had watched
D. watches
Question 10: ______ , I will let you know.
A. When I had found out the truth
B. When I find out the truth
C. When I was finding out the truth
D. When I found out the truth
Question 11: My sister ______ the washing up every day.
A. makes
B. does
C. takes
D. gives
th
Question 12: The Internet was invented _______ the 20 century.

A. at
B. in
C. with
D. from
Mark the letter A, B, C, or D with the word that differs from the other three in the position of stress.
Question 13: A. quality
B. industry
C. computer
D. confidence
Question 14: A. argue
B. listen
C. promise
D. begin
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs
from the other three in pronunciation in each of the following questions.
Question 15: A. cleans
B. stops
C. robs
D. buys
Question 16: A. cat
B. hat
C. base
D. fat
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction
Question 17: He is diagnosed with autism when he was just over two.
A
B
C
D
Question 18: Vietnamese athletes are determined to defend her regional throne in athletics.
A
B
C
D
Question 19: It will require a collectable effort from the government, providers, and the media
to meet our goals.
A
B
C
D
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to
each of the following questions.
Question 20: It isn't necessary for us to discuss this matter in great detail.
A. We should discuss this matter in great detail.
B. We might discuss this matter in great detail.
C. We needn't discuss this matter in great detail.
D. We mustn't discuss this matter in great detail.
Question 21: “I'll tell you about this event, Lan.” said Tam.
A. Tam said that he will tell Lan about that event.
B. Tam told that I would tell you about that
event.
C. Tam told that he would tell Lan about that event.
D. Tam told that he will tell her about that event.
Question 22: We last went out together two years ago.
A. We haven't gone out together for two years.
B. We didn't go out together two years ago.
C. We went out together for two years.
D. We've gone out together since two years ago.
THE END

ÔN THI TỐT NGHIỆP 2023 (TÌM MA TRẬN VÀ ĐÁP ÁN ĐÚNG)
Số 03
Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
Question 1: These plants are particularly ______ for brightening up shady areas.
A. useful
B. usefully
C. use
D. usefulness
Question 2: The house was built ten years ago, ______ ?
A. isn't it
B. was it
C. wasn't it
D. didn't it
Question 3: I go to school ______ six o'clock every morning. 
A. in
B. at
C. on
D. for
Question 4: ______ to contact Ann by phone, James decided to email her.
A. Having failed
B. Have failed
C. Have been failing D. Have been failed
Question 5: I feel______ when I drink more coffee.
A. more awake
B. the more awake
C. the most awake
D. most awake
Question 6: Children are encouraged to play _______sports as it helps in creating a healthier generation.
A. the
B. a
C. no article
D. an
Question 7: She suggested______ a dress as a gift for her daughter.
A. buying
B. to buy
C. buy
D. bought
Question 8: He applied for that position but was ______ because of his poor qualifications.
A. turned off
B. taken off
C. turned down
D. taken after
Question 9: When she came home last night, her children______TV.
A. are watching
B. were watching
C. watch
D. have watched
Question 10: He will go to the cinema with his friends ______.
A. when he was finishing his work
B. until he finished his work
C. after he had finished his work
D. as soon as he has finished his work
Question 11: The university is ______ progress in the ongoing development of educational programs.
A. having
B. doing
C. making
D. taking
Question 12: The pyramids of Egypt ______about three thousand years ago.
A. was building
B. were built
C. built
D. have built
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three
in the position of primary stress in each of the following questions.
Question 13: A. argument B. attention
C. performance
D. opponent
Question 14: A. install
B. happen
C. maintain
D. protect
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs
from the other three in pronunciation in each of the following questions.
Question 15: A. school
B. chemist
C. choose
D. ache
Question 16: A. face
B. wave
C. tank
D. cake
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction
in each of the following questions.
Question 17: My former (A) friend together with (B) his wife pays (C) a visit to my family last Sunday (D).
Question 18: If (A) a glass lizard loses its tail (B), a new one (C) grows to replace them (D).
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to
each of the following questions.
Question 19: They are not allowed to use our personal information for their own purposes.
A. They don't have to use our personal information for their own purposes.
B. They can use our personal information for their own purposes.
C. They mustn't use our personal information for their own purposes.
D. They may use our personal information for their own purposes.
Question 20: He said, “I will fly to Paris to join the Music show next week.”
A. He said he will fly to Paris to join the Music show the next week.
B. He said he would fly to Paris to join the Music show the next week.
C. He said I would fly to Paris to join the Music show the next week.
D. He said he would fly to Paris to join the Music show next week.
Question 21: I last talked to my parents 3 months ago.
A. I haven't talked to my parents for 3 months. B. I didn't talk to my parents for 3 months.
C. I talked to my parents for 3 months.
D. I have talked to my parents 3 months ago.

ÔN THI TỐT NGHIỆP 2023 (TÌM MA TRẬN VÀ ĐÁP ÁN ĐÚNG)
Số 04
Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
Question 1: The students are supposed to describe the ______ that they find most useful for learning
English.
A. apply
B. application
C. applicable
D. applicably
Question 2: Anna joined the green movement, ______?
A. was she
B. wasn't she
C. did she
D. didn't she
st
Question 4: The 31 SEA Games will be held ______ Hanoi, Vietnam from May 12 to 23, 2022.
A. for
B. on
C. in
D. at
Question 6: The two men caught the virus though they were injected with ________latest vaccine.
A. no article
B. an
C. a
D. the
Question 7: Peter decided _________a book as a gift for his younger sister on her 15th birthday party.
A. buy
B. to buy
C. buying
D. bought
Question 8: The thieves _______ in a stolen car, which was later found abandoned.
A. got away
B. went out
C. turned down
D. took up
Question 9: Mike _______ in the garden when he heard a piercing scream.
A. was working
B. worked
C. has worked
D. had worked
Question 10: You will not understand the importance of foreign language learning ______.
A. as soon as you went to university
B. when you will go to university
C. after you had gone to university
D. until you go to university
Question 11: The organizers failed to _______ the necessary arrangements for dealing with so many people.
A. make
B. do
C. take
D. break
Question 13: The missing mountain climbers ______ in the cave by the rescue team yesterday.
A. have found
B. found
C. were found
D. will find
Question 14: I've read a survey ____about social networking sites effectively, my students got good marks.
A. which conducted
B. conducted
C. to conduct
D. Being conducted
Question 15: The stricter laws against poaching give__________chances for the endangered to survive.
A. the most
B. much
C. the more
D. more
Mark the letter A, B, C, or D with the word that differs from the other three in the position of stress.
Question 18: A. logical
B. terrific
C. supportive
D. important
Question 19: A. people
B. today
C. father
D. lesson
Mark the letter A, B, C, or D whose underlined part is pronounced differently from the other three.
Question 20: A. liked
B. minded
C. helped
D. laughed
Question 21: A. lake
B. page
C. start
D. safe
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction
in each of the following questions.
Question 28. During the sixth century, the inhabitants of Gujarat (India) have developed a method of
gaining access to clean water.
A. During
B. have developed
C. gaining
D. to
Question 29. After last night's storm, the injured bird was found dead in their nest.
A. storm
B. injured
C. dead
D. their
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to
each of the following questions.
Question 31. It's obligatory for teachers to change their teaching methods.
A. Teachers should change their teaching methods. B. Teachers may change their teaching methods.
C. Teachers must change their teaching methods.
D. Teachers need to change their teaching methods.
Question 32. “Please send me a message when you go home,” said Tom to Peter.
A. Tom told Peter to send him a message when he went home.
B. Tom encouraged Peter to send him a message when he goes home.
C. Tom invited Peter to send him a message when he went home.
D. Tom warned Peter against sending him a message when he went home.
Question 33. Linda last went to her university 3 months ago.
A. Linda hasn't gone to her university for 3 months. B. Linda went to her university for 3 months ago.
C. Linda has gone to her university for 3 months.
D. Linda didn't go to her university 3 months ago.

ÔN THI TỐT NGHIỆP 2023 (TÌM MA TRẬN VÀ ĐÁP ÁN ĐÚNG)
Số 05
Mark the letter A, B, c, or D to indicate the correct answer to each of the following questions.
Question 1: High qualification and experience during internship period will help you receive an ______
offer from large companies.
A. attract 
B. attraction  
C. attractive
D. attractively
Question 2: Our task is too difficult to accomplish, ______ ?
A. isn't it
B. was it
C. is it
D. wasn't it
Question 4: My grandparents no longer go for a picnic ______ Sunday because of their health problems.
 
A. at                              B. in                              C. with                          D. on
Question 6: Mai passed ________final exam with flying colors because she studied hard. 
A. an                
B. the             
C. a          
D. no article 
th
Question 7: My parents planned ______ a party in a restaurant for my 16 birthday.
A. held
B. holding
C. hold
D. to hold
Question 8: The authorities promised to ______ the claims of corruption. 
A. check in               
B. take on              
C. look up                 
D. look into
Question 9: Janet ______ to her favorite song on TV when her mother came home from work.
A. was listening
B. listens
C. is listening
D. has listened
Question 10: ______, he will look for a job in a big city.
A. When he graduated from university
B. When he had graduated from university
C. When he was graduating from university
D. When he has graduated from university
Question 11: The woman asked me to ______ a seat and waited for her for a moment.
A. pay
B. take
C. do
D. make
Question 13: Computers ______ in last week to help the schoolkids with their studies.
 
A. brought              
B. were brought        
C. had brought        
D. were bringing
Question 14: ______ many European countries, she's planning to travel to South-east Asia this year.
 
A. Have visited
B. Have been visiting
C. Having visited        
D. Having been visited
Question 15: When the conversation was over, I felt______ enjoyable because it made you pleased.
 
A. better                 
B. the more     
C. the better              
D. more    
Mark the letter A, B, C, or D with the word that differs from the other three in the position of stress.
Question 18: A. popular
B. important 
C. religious                   D. financial
Question 19: A. pressure
B. balance                
C. action                 
D. around 
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs
from the other three in pronunciation in each of the following questions.
Question 20: A. mounted  B. combined
C. derived              
D. appealed
Question 21: A. mate
B. blame                 
C. hand                   
D. shake
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction
in each of the following questions.
Question 28:  Samantha has (A) difficulty doing (B) her Maths (C) homework (D) yesterday.
Question 29: Hyperactivity (A) in children may result from (B) his (C) eating some food additives (D). 
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to
each of the following questions.
Question 31: It's not necessary for every single kid to go to college.
A. Every single kid should go to college.
B. Every single kid must go to college.              
C. Every single kid needn't go to college.
D. Every single kid can't go to college.    
Question 32: The officers said, “We saw him throwing something out the window.”
A. The officers said that they had seen him throwing something out the window.
B. The officers said that we saw him throwing something out the window.      
            
C. The officers said that we had seen him throwing something out the window.
D. The officers said that they saw him throwing something out the window.    
Question 33: I last wrote about vaccines on this blog over a week ago.
A. I didn't write about vaccines on this blog over a week ago.               
B. I have over a week to write about vaccines on this blog.       
            
C. I haven't written about vaccines on this blog for over a week.
D. I have written about vaccines on this blog for over a week.  . /./.