問題詳情

42. In the sixth paragraph, “Our muscles and bones have developed to expect this force and it is needed to keep them strong and healthy.” What doesthe word it refer to?
(A) Earth.
(B) Gravity.
(C) A spacesuit.
(D) A spaceship.

參考答案

答案:B
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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