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Đề thi thử THPTQG môn thi TIẾNG ANH 2017 (TRƯỜNG THPTCHUYÊN-VINH-MÃ ĐỀ:169)

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.


Question 1: Thomas and Peter are meeting after a long time.

Thomas: “How have you been recently?” Peter: “ ”

A. I am going on holiday next week. B. Pretty busy, I think.

C. By car, usually. D. I am working here.

Question 2: George and Frankie are talking about their hobbies.

George: “In my opinion, action films are exciting”. Frankie: “ ”

A. What are opinion! B. There‟s no doubt about it.

C. Yes, you can do it. D. Your opinion is exactly.

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.

The elements other than hydrogen and helium exist in such small quantities that it is accurate to say that the universe is somewhat more than 25 percent helium by weight and somewhat less than 75 percent hydrogen.

Astronomers have measured the abundance of helium throughout our galaxy and in other galaxies as well. Helium has been found in old stars, in relatively young ones, in interstellar gas, and in the distant objects known as quasars. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic rays are not really a form of radiation; they consist of rapidly moving particles of numerous different kinds). It doesn`t seem to make very much difference where the helium is found. Its relative abundance never seems to vary much. In some places, there may be slightly more of it; in others, slightly less, but the ratio of helium to hydrogen nuclei always remains about the same.

Helium is created in stars. In fact, nuclear reactions that convert hydrogen to helium are responsible for most of the energy that stars produce. However, the amount of helium that could have been produced in this manner can be calculated, and it turns out to be no more than a few percent. The universe has not existed long enough for this figure to be significantly greater. Consequently, if the universe is somewhat more than 25 percent helium now, then it must have been about 25 percent helium at a time near the beginning.

However, when the universe was less than one minute old, no helium could have existed. Calculations indicate that before this time temperatures were too high and particles of matter were moving around much too rapidly. It was only after the one- minute point that helium could exist. By this time, the universe had cooled so sufficiently that neutrons and protons could stick together. But the nuclear reactions that led to the formations of helium went on for only relatively short time. By the time the universe was a few minutes old, helium production had effectively ceased.

Question 3: What does the passage mainly explain?

A. Why hydrogen is abundant. B. When most of the helium in the universe was formed.

C. How stars produce energy. D. The difference between helium and hydrogen.

Question 4: According to the passage, helium is .

A. the second-most abundant element in the universe. B. difficult to detect.

C. the most prevalent element in quasars. D. the oldest element in the universe.

Question 5: The word "constituents" is closest in meaning to .

A. relatives B. components C. causes D. targets

Question 6: Why does the author mention "cosmic rays"?

A. To explain how the universe began. B. To explain the abundance of hydrogen in the universe.

C. As part of a list of things containing helium. D. As an example of an unsolved astronomical puzzle.

Question 7: The word „they‟ refers to .

A. constituents B. radiation C. cosmic rays D. particles

Question 8: The word "vary" is closest in meaning to

A. change B. include C. stretch D. mean

Question 9: The creation of helium within stars .

A. causes helium to be much more abundant in old stars than in young stars

B. produces hydrogen as a by-product

C. cannot be measured

D. produces energy

Question 10: Most of the helium in the universe was formed .

A. in a very short time B. during the first minute of the universe`s existence

C. in interstellar space D. before most of the hydrogen