AIDS is said ______ the number-one killer of both men and women over the past few years in that region.
A、
being
B、
to be
C、
to have been
D、
having been
【正确答案】
C
【答案解析】
由句中的时间状语“over the past few years”可知动作发生在谓语动作之前，故应用完成时。sb./sth. is said to do...是常用句型，意为“据说……”。故选C。
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