题目内容

Everyone should make a contribution         the environment.
A．to protectB．to protectingC．protectsD．protected
B
考查非谓语动词.句意:每个人应该为保护环境做出一份贡献.make a contribution to doing sth表示全力一赴做某事,to是介词后面接名词或者动名词作宾语,动名词表示抽象动作,故选B.。
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