【題目】Marie Curie also ________ the use of X-ray machines, ________ now widely used in hospitals.

A. pushed for, which is B. pushed out, which are

C. pushed for, which are D. pushed in, which is

【答案】C

【解析】

試題分析：句意：瑪麗居里也推廣X射線機(jī)的使用，目前已廣泛應(yīng)用于醫(yī)院。此題考查固定短語be pushed for被推為和定語從句，因?yàn)橄刃性~是machines是復(fù)數(shù)，故用are。根據(jù)句意，應(yīng)選C。

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