About 10 million dolphins are said in the past 15 years.A. to have killed B. to killC. to have been

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【题目】About 10 million dolphins are said ________ in the past 15 years.

A. to have killed B. to kill

C. to have been killed D. to be killed

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【答案】C

【解析】

试题分析：考查固定句型，句意：据说大约有一千万头海豚在过去的15年被杀死，be said to have done据说已经。。，故选C项。

考点 : 考查固定句型