题目内容
12．-I think everyone should make a contribution to ________the environment．-I agree with you．（ ）
| A． | protect | B． | protecting | C． | protection |
分析 -我认为每个人应当为保护环境做出贡献．
-我同意你的观点．
解答 答案：B 根据句中关键词make a contribution to可知，固定短语make a contribution to doing sth．为做某事作出贡献，故选B．
点评 对于含有介词to的短语考生经常会有用错的时候，牢记固定短语的用法是做题的关键．
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