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单选题
78.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
答案解析
正确答案：C
解析：
解析:语法规则。be said to be表示“据说(目前)是”。be said to have been表示“据说(过去或已经)是”。 据说艾滋病在过去的几年中对于那个地区的男性和女性来说都是头号杀手。
相关知识点：
AIDS过去是头号杀手
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