The river is said __________ in a fire during the past 10 years. A．to have pollu
题型：不详难度：来源：
The river is said __________ in a fire during the past 10 years. | A．to have polluted | B．it has been polluted | | C．to pollute | D．to have been polluted |
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答案
| D |
解析
试题分析：考查句型：sb/sth is said to do/to have done,据相信某人/某物…，如果是将要做，用不定式一般式to do如果是已经做了，用不定式的完成式，句意：据说这条河在过去的10年里已经被污染了，用不定式完成式的被动，选D。
点评：固定句型是学习语言的重要环节。sb/sth is reported /believed to do/to have done,可以转化成It is reported /believed that句型，解答这类题目，关键是理解题干意思从而判断是动词不定式的什么形式，根据意思放入句子中进行比较，不难选出正确答案。 |
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