题目内容

AIDS is said ______ the biggest health challenge to human 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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AIDS is said ______ the biggest health challenge to both men and women in that area over the past few years.

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

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

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

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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