Question

Everyone should make a contribution         the environment.

Answer 1

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.。