Chọn đáp án đúng:

Vaccinating many people against SARS-CoV-2 could stall infection rates even among unvaccinated children in the same community. Last December, Israel launched one of the fastest vaccination schemes in the world, reaching 50% of the population in 9 weeks. (16) ________ only people aged 16 and over were eligible for the jab.
To test the ripple effects of widespread vaccination, Tal Patalon at Maccabi Healthcare Services in Tel Aviv-Yafo, Israel, Roy Kishony at the Technion — Israel Institute of Technology in Haifa and their colleagues analysed COVID-19 vaccinations and test results (17) ________ between January and March 2021 for people in 223 Israeli communities. In (18) ________ community, the authors examined the relationship between the vaccination rate in adults over three 3-week intervals and the rate of positive results for a COVID-19 test in children 35 days later.
The authors found that, in the weeks after older people had received the Pfizer–BioNTech vaccine, the infection risk among children under 16 dropped proportionally to the percentage of adults (19) ________ had been vaccinated. The authors warn that their results might be influenced by children who had previously been infected, even though the study included communities with low (20) ________ rates. The findings have not yet been peer reviewed.
Question 16: A. Because    B. Although    C. Before       D. However
Question 17: A. recorded    B. intended    C. depended    D. afforded
Question 18: A. neither       B. any            C. each            D. some
Question 19: A. which         B. who           C. where          D. when
Question 20: A. infection   B. transmission   C. defilement   D. insanitation

Chọn đáp án đúng:

33. He and his wife took the ____________ decision to switch off their son’s life support machine.
A. painful       B. hurt       C. aching        D. sore
34. The sale will recoup a small portion of the money ____________ from company pension funds by the publisher.
A. burgled       B. thieved        C. stolen      D. robbed
35. These plants produce flowers from __________ spring to late summer.
A. soon      B. beginning       C. starting      D. early
36. The legal arrangements for the sale are a(an) ___________ for negotiation.
A. trouble     B. problem     C. matter     D. issue
37. The death ___________ among the homeless is three times higher than the rest of the population.
A. percentage      B. rate     C. proportion     D. ratio
38. By the end of the seventeenth century the industrial ___________ was much more evident.
A. scene     B. landscape    C. scenery     D. sight
39. The witness tried to give a(an) _____________ description of what she had seen.
A. accurate     B. exact     C. precise     D. correct
40. If they lose their jobs, instead of going on the ____________ they have to leave the country.
A. wage      B. salary     C. pension     D. dole

Chọn đáp án đúng:

The Pennsylvania Department of Health is working to ensure all enrolled vaccine providers have information publicly available for those currently eligible to be vaccinated. This map will be (1) ________ weekly on Monday afternoon. Click on a marker to see details on vaccination locations. All locations listed
on the map are enrolled providers. The dark blue circles represent locations (2) ________ received vaccine from the Pennsylvania Department of Health (3) ________ the light blue diamonds are locations which received vaccine directly from the federal government. It is important to note that the supply of vaccine
compared to the demand is very limited. Please note that an allocation of vaccine does not guarantee that appointments are still available. Contact the provider directly to schedule an appointment if you are eligible in Phase 1A. This map is intended for people seeking their first (4) ________ of vaccine. If you already received your first dose of Pfizer or Moderna vaccine, you should return to the (5) ________ provider for your second dose regardless of whether they appear on this map.
Question 1: A. uploaded    B. updated    C. upscaled    D. upsold
Question 2: A. who      B. where        C. whose         D. which
Question 3: A. and      B. although     C. because     D. but
Question 4: A. piece    B. dose           C. drop           D. unit
Question 5: A. each     B. another       C. same         D. every

Chọn đáp án đúng:

The Isthmus of Suez, the sole land bridge between the continents of Africa and Asia, is of relatively recent geologic origin. Both continents once (6) ________ a single large continental mass, but during the Paleogene and Neogene periods (about 66 to 2.6 million years ago) the great fault structures of the Red Sea
and Gulf of Aqaba developed, with the opening and subsequent drowning of the Red Sea trough as far as the Gulf of Suez and the Gulf of Aqaba. In the succeeding Quaternary Period (about the past 2.6 million years), there was considerable oscillation of sea (7) ________, leading finally to the emergence of a low-lying isthmus (8) ________ broadened northward to a low-lying open coastal plain. There the Nile delta once extended farther east—as a result of periods of abundant rainfall coincident with the Pleistocene Epoch (2,588,000 to 11,700 years ago)—and two river arms, (9) ________ distributaries, formerly crossed the northern isthmus, one branch reaching the Mediterranean Sea at the narrowest point of the isthmus and the (10) ________ entering the sea some 14.5 km (9 miles) east of present Port Said.

Question 6: A. made     B. solved     C. occurred       D. formed
Question 7: A. level       B. rate         C. basement     D. current
Question 8: A. when      B. what        C. that              D. who
Question 9: A. or           B. so            C. since            D. but
Question 10: A. many    B. other       C. every            D. another

Chọn đáp án đúng:

A recent study suggests that teens’ relationship with parents, friends and teachers may have a lot to do with why they don’t get a good night’s sleep.
   David Maume, a sociologist and sleep researcher, analyzed federal health data, which interviewed 974 teenagers when they were 12, and then again at 15. He found that family dynamics have much to do with how well kids sleep. Teens, who had warm relations with their parents and felt like they could talk to them or their parents were supportive of them, tended to sleep better. However, families that were going through a divorce or a remarriage tended to affect teens’ sleep.
   And problems at school also affected teens’ sleep. Feeling safe at school and having good relations with teachers tended to promote better sleep. As did good relationships with friends. Kids who took part in sports or other positive social activities or shared similar academic goals with their friends were also more
likely to get a good night’s sleep.
  These add up to what makes lots of sense: a general feeling of well-being helps teens sleep. If we’re happy and contented, we’re much more likely to sleep better than if we’re sad and anxious.
   Now, of course, teens can hardly resist being drawn to their computers and social networking. Maume also found that when parents were strict not only about bedtime, but also about limiting technology, kids slept better. It’s a finding that seems obvious, but parents really do matter when it comes to health habits of their teenagers. Clearly, teenagers aren’t getting 9 to 10 hours a night, which puts them at risk for all the consequences of lack of sleep, including poor academic performance, colds and stress.

Question 23: What is the passage mainly about?
A. It is necessary for teens to join in sports and positive social activities.
B. Lack of adequate sleep puts teens at risk of performing poorly at school.
C. Modern technology has something to do with teens’ sleep problems.
D. Teens’ sleep is linked to their relationship with people around them.
Question 24: What does the word “them” in the passage refer to?
A. parents   B. family dynamics    C. warm relations    D. teens
Question 25: According to Maume’s analysis, who will probably have a poor night’s sleep?
A. Teens who feel like talking with their parents.
B. Teens who lack a sense of security at school.
C. Teens who have friends sharing their dreams
D. Teens who feel contented about themselves
Question 26: The word “well-being” in paragraph 4 probably means______.
A. insecurity    B. happiness    C. excitement    D. worrying
Question 27: According to the passage, which of the following is NOT TRUE?
A. Teens whose parents broke up can’t sleep well.
B. Parents can help their children sleep better by restricting their use of technology.
C. Parents have nothing to do with their children’s health habits.
D. Teens are unable to perform well at school if they don’t get sufficient sleep.

I left school and university with my head packed full of knowledge; enough of it, anyway, to pass all the examinations that were put in my path. As a well-educated man I rather expected my work to be a piece of cake, something at which my intellect would allow me to excel without (undue) effort. It came as something of a shock, therefore, to encounter the world outside for the first time, and to realize that I was ill- equipped, not only for the necessary business of earning a living, but, more importantly, for coping with all the new decisions which came my way, in both life and work.
    I was soon to discover that my mind had been trained to deal with closed problems, whereas most of what I now had to deal with were open- ended problems. “What is the cost of sales?” is a closed problem, one with a right or a wrong answer. “What should we do about it?” is an open problem, one with any number of possible answers, and I had no experience of taking (this type) of decision.
    I had been educated in an individualist culture. My scores were mine. No one else into it, except as competitors in some imagines race. I was on my own in the learning game at school and university. Not so in my work, I soon realized. Being an individual star would not help me there if it was in a failing group. I
had discovered, rather later than most, the necessity of others.
   So much of the content of what I had learned was irrelevant, while the process of learning it had (cultivated) a set of attitudes and behaviors which were directly opposed to what seemed to be needed in real life. Although I had studied philosophy, I hadn’t applied it to myself. It would be nice to think that our schools
today prepare people better for life and for work. The subjects may appear to be a little more relevant, but we are still left to learn about work at work, and about life by living it. I believe we could do more to make sure that the process of education had more in common with the processes of living and working as they
are today, so that the shock of reality is less cruel.

Question 10: What does the passage mainly discuss?
A. The necessity of being exposed to the harsh reality. B. The complexity of the world outside.
C. The urgent need for educational reforms. D. The gap between education and the real world.
Question 11: The word “undue” in paragraph 1 is closest in meaning to ______.
A. negligible     B. inconsiderable    C. extensive    D. constant
Question 12: The word “this type” in paragraph 2 refers to _______.
A. the type with some possible answers  B. the type related to the cost of sales
C. the type with a right answer                  D. the type with a wrong answer
Question 13: According to the passage, __________.
A. The author was ill- prepared for real- life experiences
B. The author found it necessary to view his colleagues as competitors
C. The author could deal with new decisions
D. The author realized the importance of individualism in his work
Question 14: The word “cultivated” in paragraph 4 is closest in meaning to ______.
A. changed    B. developed     C. weakened     D. required
Question 15: Which of the following is NOT mentioned, according to the passage?
A. The author realized that he needed the company of his colleagues at work.
B. The author found that he should have taken advantage of his intellectual ability.
C. The author found that he had been trained to deal with problems in the wrong way.
D. The author expected to succeed by using the qualities his education had developed when leaving university.
Question 16: Which of the following can be inferred about the author’s thoughts from paragraph 4?
A. Students should be aware of applying philosophy to their life.
B. Relevance of learning contents has reduced the gap between school and work.
C. Work and life experience plays a little role in dealing with the harsh reality.
D. Today’s educational system does not give students a much better preparation.

Cho hàm số y=x⁴-2mx²+2. Tìm m để hàm số có 3 cực trị tạo thành tam giác có:

a) bán kính đương tròn nội tiếp bằng 1

b) bán kính đường tròn ngoại tiếp gấp đôi bán kính đường tròn nội tiếp

Chọn đáp án đúng:

Light pollution is the existence of too much unwanted, artificial light in the environment. Too much light pollution has (5) ________ effects on people. It upsets ecosystems, has bad health effects, and wastes energy. In upsetting ecosystems, light pollution poses a serious threat in particular to night wildlife, having damaging impacts on plant and animal physiology. It can affect the migratory patterns of animals, change competitive interactions of animals, and cause physiological harm. The rhythm of life as we know it is controlled by the natural daily patterns of light and dark. (6) ______, the disruption to these patterns does harm to the ecological dynamics.
With respect to adverse health effects, many species, especially humans, are dependent on natural body cycles, and the production of melatonin, (7) ______ are regulated by light and dark (e.g., day and night). If humans are exposed to light while sleeping, melatonin production can be affected. This can lead to sleep
disorders and (8) ______ health problems such as increased headaches, worker fatigue, stress, some forms of obesity due to lack of sleep and increased anxiety. Health effects are not only due to over- illumination or excessive (9) _____ of light over time, but also improper spectral composition of light.
Question 5: A. essential    B. helpful    C. positive    D. negative
Question 6: A. However    B. Conversely    C. Whereas    D. Therefore
Question 7: A. that    B. whom    C. which     D. whose
Question 8: A. another    B. the other    C. other     D. others
Question 9: A. coverage    B. inauguration    C. exposure    D. contact

Chọn giao tiếp phù hợp:

Question 21: Yoona has been invited to Rose’s party and she is talking to Rosé at the end of the party.

- Yoona: “Thank you for a wonderful evening!” - Rosé: “__________”.
A. You’re welcome            B. Never mind
C. Have a great day!        D. It’s a very kind of you to say so.
Question 22: Jenny and Anna are having a discussion about interesting career options.
- Jenny: “I think teaching is one of the most rewarding jobs because it gives you a chance to create impacts on future generations.

” - Anna: “________”
A. Let’s drop it                     B. Why not?
C. No doubt about it     D. Let me think about that and get back to you.

Chọn đáp án đúng:

Question 31: The dry season is coming to an end, _______?
A. does it    B. doesn’t it    C. isn’t it    D. is it
Question 32: Last night, she _______ a big diamond ring by her husband – to – be at her birthday party.
A. gave    B. gives    C. was giving     D. was given

Question 33: ______ she studies, the better results she will probably get.
A. The harder    B. Hardest    C. Harder     D. The hardest
Question 34: He ________ on his report when his computer suddenly shut down.
A. worked     B. was working    C. works     D. is working
Question 35: We didn’t enjoy the day ________ the weather was so awful.
A. because     B. due to     C. although     D. in spite of
Question 36: Jeff will have traveled to 20 countries _______ at the end of next month.
A. after he had turned fifty        B. by the time he turns fifty
C. when he turned fifty              D. as soon as he turned fifty
Question 37: When you grow up, you must learn how to become independent ______ your parents.
A. of       B. with       C. in       D. on
Question 38: ________ on the project, he felt absolutely exhausted when it finished.
A. Being spent a lot of time             B. Spent a lot of time
C. Having spent a lot of time           D. To spend a lot of time
Question 39: At the farewell party, Jane gave Danny a _____ mug with her portrait outside so that he would always remember her.
A. lovely big Japanese                    B. big Japanese lovely                                 C. Japanese big lovely                                             D. lovely Japanese big
Question 40: In Asian countries, __________ is a form of connection between two families or two clans rather than two people.
A. marry     B. marriage     C. marrying    D. married
Question 41: When I first traveled by plane, I really felt excited as the plane _______ from the ground.
A. took off     B. filled in    C. stood up     D. turned down
Question 42: In order to become a member of the country club, applicants have to ______ set by the club president.
A. enhance communication         B. widen the gap
C. meet the requirements            D. gain confidence
Question 43: The website is managed by volunteers who put in _______ hours of work helping students deal with situations of bullying.
A. generous    B. countless    C. overwhelming    D. widespread
Question 44: IT technology has developed to a very high level, ______ the community and transforming the residents’ lives positively.
A. creating impacts on       B. doing harm to
C. causing trouble for        D. making bad decisions on
Question 45: The journalist had to ______ because what he had written in his article about the celebrity’s private life was wrong.
A. rest on his laurels     B. put himself in other people’s shoes
C. eat humble pie         D. call it a day

Question 46: I started to learn English 10 years ago.
A. I have been learning English for 10 years.       B. I learnt English for 10 years.
C. The last time I learnt English was 10 years ago.                                                D. I have started learning English for 10 years.
Question 47: “I will pay back the money, Linda” said Helen.
A. Helen insisted on paying the money back to Linda.
B. Helen suggested paying the money back to Linda.
C. Helen promised to pay the money back to Linda.
D. Helen apologized to Linda for borrowing her money.
Question 48: You were supposed to hand in this assignment two days ago.
A. You ought to have handed in this assignment two days ago.
B. You must have handed in this assignment two days ago.
C. You should have been supposed to hand in this assignment two days ago.
D. You may have handed in this assignment two days ago.

Question 49: You didn’t perform well in the interview. I feel sorry for you.
A. Had you performed better in the interview, I didn’t feel sorry for you.
B. I wish you performed better in the interview.
C. I regret that you couldn’t have performed better in the interview.
D. I wish you had performed better in the interview.
Question 50: I posted the letter. I realized that I had forgotten to put on a stamp.
A. Not only did I realize that I had forgotten to put a stamp on the letter but I posted it as well.
B. Scarcely had I posted the letter when I realized that I had forgotten to put on a stamp.
C. No sooner had I posted the letter than I forgot to put on a stamp.
D. Only before posting the letter did I realize that I had forgotten to put on a stamp.

Chọn trọng âm khác:

Question 3: A. disaster    B. attention    C. adventure    D. character
Question 4: A. decide    B. copy    C. concern    D. arrive

Chọn từ đồng nghĩa:

Question 17: She enjoyed the chance to (converse) with those who speak her language.
A. teach    B. translate    C. preserve    D. talk
Question 18: The most (diligent) students, who always put efforts into what they do, will succeed.
A. competitive   B. intelligent    C. hard- working     D. lazy

Chọn từ trái nghĩa:

Question 19: Before he went on vacation, Mike left (explicit) instructions for the decoration of his office and everyone got it.
A. simple         B. clear       C. direct       D. vague
Question 20: Although they hold similar political views, their religious beliefs present a (striking contrast).
A. great disparity                  B. significant difference
C. minor comparison            D. complete coincidence

Sửa lỗi sai:

Question 28: Some ancient philosophers such as Pythagorus and Aristotle were ahead of their time because he thought the earth was round.
A. he thought   B. ahead of    C. Some    D. because
Question 29: I woke up late for my interview because I have been worrying about it all night and didn’t get much sleep.
A. woke up late  B. get much sleep  C. have been worrying  D. all night
Question 30: A panel of uninterested judges who had never met the contestants before judged the singing contest with justice.
A. A panel    B. uninterested judges   C. contestants   D. judged

Chon dap an dung:

Question 32: Perhaps the boy will not take a nap today.
A. The boy should take a nap today.      B. The boy need to take a nap today.
C. The boy may not take a nap today.    D. The boy mustn’t take a nap today.
Question 33: It is unnecessary for you to finish the report until tomorrow afternoon
A. You needn’t finish the report until tomorrow afternoon.
B. You have to finish the report until tomorrow afternoon.
C. You may finish the report after tomorrow afternoon
D. You should finish the report until tomorrow afternoon

Question 36: Her negative thoughts are serious. They have damaged her self-esteem.
A. Only if her negative thoughts were serious would they damage her self-esteem.
B. Not until her negative thoughts had damaged her self-esteem were they serious.
C. So serious are her negative thoughts that they have damaged her self-esteem.
D. But for her serious negative thoughts, they would have damaged her self-esteem.

Chon dap an dung:

(45) __________ research on the impacts of mass media began in the 1920s and 1930s, with the rise of muckraking journalism—elites became concerned about the effects of investigative reporting in magazines such as McClure’s on political decision-making. Mass media became a prominent focus of study
in the 1950s (46) _______television became widely available, and academic departments dedicated to communication studies were created. These early studies investigated the cognitive, emotional, attitudinal, and behavioural effects of media on (47)_____children and adults; in the 1990s, researchers began to use those earlier studies to draw up theories (48) ________ concerned the use of media today.

In the 1970s theorists such as Marshall McLuhan and Irving J. Rein warned that media critics needed to watch how media affects people. Today, this remains a key concern; (49) ________ attention has been paid, for example, to the impact on the 2016 election of false messaging distributed on social media. (50) ________ the myriad forms of mass communication available today have also encouraged some researchers to begin to investigate "what people do with media."
Question 45: A. A great many   B. A lot of   C. A great deal   D. A number of
Question 46: A. after    B. until    C. before    D. while
Question 47: A. both     B. all      C. either      D. neither
Question 48: A. who     B. which    C. when     D. where
Question 49: A. every    B. another    C. much    D. many
Question 50: A. So      B. Although     C. Because    D. But

Chon dap an dung:

Question 14: He hated being in the army ______ he had to obey commands.
A. because of    B. instead of     C. because     D. although
Question 15: I didn’t tell her that he was late ______ I didn’t want to cause her any alarm.
A. because    B. however    C. although     D. unless
Question 16: I almost missed my flight ______ there was a long queue in the duty-free shop.
A. in spite of    B. before    C. thanks to    D. because
Question 17:________ every major judo title, Mark retired from international competition.
A. To win    B. Being won    C. Having won     D. Won
Question 18: ________ the homework, she ate a sandwich.
A. Having done    B. Did    C. To do     D. Being done
Question 19: ________ his first-aid course, Joe proves extremely helpful as a rescueworker.
A. Having finished   B. Finished    C. To finish    D. Being finished
Question 20:Her ______ isn’t good with her father, but she’s very close to her mother.
A. relate    B. relationship    C. relative    D. relatively
Question 21: She was in Mumbai to ______ an award for her latest novel.
A. acceptance B. acceptable C. accept D. acceptably
Question 22: The supermarket will have closed ______.
A. before Sandra comes to buy some sugar
B. when Sandra was coming buy some sugar
C. as soon as Sandra will come to buy some sugar
D. so that Sandra came to buy some sugar
Question 23: She will call you to confirm _______.
A. until she received the parcel     B. as soon as she was receiving the parcel
C. when she receives the parcel   D. after she had received the parcel
Question 24: I will have finished the decorating ______.
A. By the time you come home     B. when you came home
C. as soon as you come home     D. after you have come home

Sua loi sai:

Question 27:He left London 2 years ago and I didn’t see him since then.
A. London     B. ago    C. didn’t see     D. since
Question 28: The whole matter is farther complicated by the fact that Amanda and Jo refuse to speak to
each other.
A. The whole    B. farther    C. the fact that    D. to each
Question 29: Since their establishment two years ago, the advice centre has seen over 500 people a week.
A. their        B. ago        C. over       D. week

Chon trong am khac:

Question 37: A. obey    B. forbid    C. current    D. donate
Question 38: A. efficient    B. addicted    C. historic     D. fantasy