题目内容
6.The pollution problem here seems to get more and more serious.Something ____with it.( )A. | has done | B. | must be done | C. | is doing | D. | was done |
分析 这里的污染问题好像越来越严重了,必须采取措施来解决.
解答 答案:B
首先根据语境"这里的污染问题好像越来越严重了,可知必须采取措施来解决",主语something 是动作do的承受者,确定用被动语态,表达"必须"之意用情态动词must,本题考查含有情态动词的被动语态,其构成是:主语+情态动词+be+动词的过去分词.do的过去分词是done,故答案为:B
点评 本题考查时态和语态.每个时态都有标志词,熟记这些标志词是做题的关键.在没有时间状语的情况下可以根据语境来对时态做出判断.

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