Question

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

 

Answer 1

【答案】

D

【解析】

試題分析：句意：據說在過去的幾年，艾滋病一直是那個地區(qū)的男男女女的最大的健康挑戰(zhàn)。sth. is said to...是固定結構，所以只能選B或D再因為有時間狀語over the past few years.我們必須用動詞不定式的完成時。故選D。

考點：考查句子結構以及動詞不定式的時態(tài)。