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Câu hỏi:

09/07/2024 157

Read the following passage and mark the letter  A, B, C, or  D on  your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Mobile phones emit microwave radio emissions. Researchers are questioning whether exposure to these radio waves might (36) _______ to brain cancer. So far, the data are not conclusive. The scientific evidence does not (37) _______ us to say with certainly that mobile phones are categorically (38) _______. On the other hand, current research has not yet (39) _______ clear adverse effect associated with the prolonged use of mobile phones.

Numerous studies are now going (40) _______ in various countries. Some of the results are contradictory but others have shown an association between mobile phone use and cancer. (41) _______, these studies are preliminary and the issue needs further, long - term investigation.

(42) _______ the scientific data is more definite, it is prudent for people to try not to use mobile phone for long (43) _______ of time. Don't think that hands free phones are any safer either. At the moment, research is in fact showing the (44) _______ and they may be just as dangerous. It is also thought that young people (45) _______ bodies are still growing may be at particular risk.Question 39

A. proved

Đáp án chính xác

B. created

C. demonstrated

D. caused

Trả lời:

verified Giải bởi Vietjack

Đáp án : A

Prove = chứng minh. Create = tạo dựng. Demonstrate = giải thích, biểu thị, biểu tình. Cause = gây ra

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CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to the sentence given in each of the following questions

I hope to have the privilege of working with them again

Xem đáp án » 18/06/2021 2,564

Câu 2:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

In this era of increased global warming and diminishing fossil fuel supplies, we must begin to put a greater priority on harnessing alternative energy sources. Fortunately, there are a number of readily available, renewable resources that are both cost- effective and earth – friendly. Two such resources are solar power and geothermal power

Solar energy, which reaches the earth through sunlight, is so abundant that it could meet the needs of worldwide energy consumption 6,000 times over. And solar energy is easily harnessed through the use of photovoltaic cells that convert sunlight to electricity. In theUSalone, more than 100, 000 homes are equipped with solar electric systems in the form of solar panels or solar roof tiles. And in other parts of the world, including many developing countries, the use of solar system is growing steadily

Another alternative energy source, which is abundant in specific geographical areas, is geothermal power, which creates energy by tapping heat from below the surface of the earth. Hot water and steam that are trapped in underground pools are pumped to the surface and used to run a generator, which is produces electricity. Geothermal energy is 50, 000 times more abundant than the entire known supply of fossil fuel resources. And as with solar power, the technology needed to utilize geothermal energy is fairly simple. A prime example of effective geothermal use inIceland, a region of high geothermal activity where over 80 percent of private homes are heated by geothermal power.

Solar and geothermal energy are  just two of promising renewable alternatives to conventional energy sources. The time is long overdue to invest in the development and use of alternative energy on global scale

According to the passage, why should we consider using alternative energy sources ?

Xem đáp án » 18/06/2021 2,158

Câu 3:

Not until a monkey is several years old ________to exhibit signs of independence from its mother

Xem đáp án » 18/06/2021 2,023

Câu 4:

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

Yolanda ran over to me and breathless informed the failure of our team.

Xem đáp án » 18/06/2021 1,525

Câu 5:

Many student couldn’t _______, but the teacher _______ the problem by going into a detailed explanation

Xem đáp án » 18/06/2021 1,328

Câu 6:

When he came ________, she found herself in hospital

Xem đáp án » 18/06/2021 1,130

Câu 7:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to the sentence given in each of the following questions

Though many scientific breakthroughs have resulted from mishaps it has taken brilliant thinkers to recognize their potential

Xem đáp án » 18/06/2021 1,092

Câu 8:

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

When I came back I realized that my camera had been disappeared

Xem đáp án » 18/06/2021 996

Câu 9:

________for the fact that he was working abroad, he would willingly have helped with the project

Xem đáp án » 18/06/2021 832

Câu 10:

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

Species like snakes, lizards, coyotes, squirrels, and jack rabbits seems to exist quite happily in the desert

Xem đáp án » 18/06/2021 820

Câu 11:

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

In human beings, as in other mammal, hair around the eyes and ears and in the nose prevents dust, insects, and other matter from entering these organs

Xem đáp án » 18/06/2021 780

Câu 12:

Neither of them will be treated preferentially, ________ ?

Xem đáp án » 18/06/2021 770

Câu 13:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions .

         All mammals feed their young. Beluga whale mothers, for example, nurse their calves for some twenty months, until they are about to give birth again and their young are able to find their own food. The behavior of feeding of the young is built into the reproductive system. It is a nonelective part of parental care and the defining feature of a mammal, the most important thing that mammals-- whether marsupials, platypuses, spiny anteaters, or placental mammals -- have in common.

But not all animal parents, even those that tend their offspring to the point of hatching or birth, feed their young. Most egg-guarding fish do not, for the simple reason that their young are so much smaller than the parents and eat food that is also much smaller than the food eaten by adults. In reptiles, the crocodile mother protects her young after they have hatched and takes them down to the water, where they will find food, but she does not actually feed them. Few insects feed their young after hatching, but some make other arrangement, provisioning their cells and nests with caterpillars and spiders that they have paralyzed with their venom and stored in a state of suspended animation so that their larvae might have a supply of fresh food when they hatch.

            For animals other than mammals, then, feeding is not intrinsic to parental care. Animals add it to their reproductive strategies to give them an edge in their lifelong quest for descendants. The most vulnerable moment in any animal's life is when it first finds itself completely on its own, when it must forage and fend for itself. Feeding postpones that moment until a young animal has grown to such a size that it is better able to cope. Young that are fed by their parents become nutritionally independent at a much greater fraction of their full adult size. And in the meantime those young are shielded against the vagaries of fluctuating of difficult-to-find supplies. Once a species does take the step of feeding its young, the young become totally dependent on the extra effort. If both parents are removed, the young generally do not survive

What can be inferred from the passage about the practice of animal parents feeding their young?

Xem đáp án » 18/06/2021 735

Câu 14:

His aunt bought him some books on astronomy and football, _________ he had any interest in

Xem đáp án » 18/06/2021 716

Câu 15:

(After a party at Mary’s house). Bill: ______ Mary: Thanks for your compliment. Good night!

Xem đáp án » 18/06/2021 638

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