AIDS is said________the number-one killer of both men and women over the past few years in that region.

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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.

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

答案C

解析 本题考查非谓语动词。空后的内容是对主语的补充说明,充当主语补足语的成分。非谓语动词中的动词不定式可以做主语补足语,结构通常为sb. be said/believed/known/reported+to do,当“in/during/over the last+一段时间”做句子的时间状语时,要用现在完成时,故答案为C项。
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