【单选题】
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
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根据网考网移动考试中心的统计,该试题:
1%的考友选择了A选项
10%的考友选择了B选项
88%的考友选择了C选项
1%的考友选择了D选项