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.