Aids is said_____ the biggest health challenge to both men and women over the past few years. A.that it is B.to be C.that it has been D.to have been
人气：341 ℃ 时间：2020-04-02 14:28:11
解答
据说…… 有两种表达法：1 sth is said to be 2 It is said that+从句 又句中有明显的暗示：over the past few years 固定用完成时.所以选D. C 应该为：It is said that aids has been the biggest health challenge to both men and women over the past few years.
