AIDS is said ______ the number-one killer of both men and women over the past fe

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问题 AIDS is said ______ the number-one killer of both men and women over the past few years in that region.[2002]

选项 A、being
B、to be
C、to have been
D、having been

答案 C

解析 be said to be表示“据说(目前)是”，由于本句的时间状语为over the past few years，所以要求这里的不定式要使用完成式表示过去已经发生的事，故选项C正确。

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