AIDS is said________the biggest challenge to both men and women in that area over the past few years...
2022-11-16 08:50:56 168次 2013-2014学年福建省高三第二次月考英语试卷（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 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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