AIDS is said ______the biggest health challenge to both men and women in that area over the past few...
2022-12-31 10:15:52 143次 2013届内蒙古高二下学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
AIDS is said ______the biggest health
challenge to both men and women in that area over the past few years.
|
A．that it is
|
B．to be
|
C．that it has been
|
D．to have been
|
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