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

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 不定式用法题。be said to be表示“据说(目前)是”；由于本句的时间状语为over thepast few years，所以要求这里的不定式要使用完成式，因为不定式完成式表示过去已经发生的事，be said to have been表示“据说(过去或已经)是”，因此本题应该选[C]。
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