The word they in paragraph 1 refers to__________. A. nuclear reactions B. giant planets

Câu hỏi :

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

A. nuclear reactions

B. giant planets 

C. terrestrial 

D. substances

* Đáp án

B

* Hướng dẫn giải

Đáp án B

Jupiter and the other giant planets are of a low-density type quite distinct from the terrestrial planets: they are composed predominantly of such substances as hydrogen, helium, ammonia, and methane, unlike terrestrial planets.

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