【題目】Everyone should play a part __ __ the earth.

A. to save B. saved C. in saving

【答案】C

【解析】

句意:每個人都應該參與拯救地球。to save去拯救;saved過去式;in saving介詞in后跟動名詞形式。句中使用了短語play a part in…“在…...中起作用,參與”,后跟名詞或者動名詞形式。故應選C。

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