AIDS is said _______the biggest health challenge to both men and women in that area in the past thre...
2022-07-31 12:22:57 72次 广东省汕头市2019-2020学年高二上学期期末英语试卷 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 in the past three years.
A.that it is. B.to be.
C.that it has been. D.to have been.
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