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
D
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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
D