The atmosphere ______ certain gases mixed together in definite proportions.

题目

The atmosphere ______ certain gases mixed together in definite proportions.
A.composes ofx05x05B.is made upx05x05x05C.consists ofx05x05x05D.makes up of 为什么是C啊,其他几项呢不也是组成的意思吗?

答案

要表示 由xx组成,compose of,consist of,make up of都是可以的,用主动形式的就只有consist of.compose of 和make up of都要用被动形式 也就是 be composed/made up of
所以这里选项只有选C了