题目内容

3．Community police have made a very positivecontribution（contribute） to crime prevention．

分析 社区警察为预防犯罪做出了积极贡献．

解答 答案是contribution．
本题考查动词的适当形式；contribute vt．贡献，投稿；contribution n．贡献，投稿；make a contribution to对…做贡献；促进； 故答案是contribution．

点评 本题是要求用所给动词的适当形式填空，解题时首先考虑句中需要的是谓语动词还是非谓语动词；其次，如果是谓语动词关注时态、语态和数的变化；如果是非谓语动词要联系非谓语的基本用法判断非谓语的形式．

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