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
答案: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