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：

本题考查say的句型，或者用sb．/sth．be said to do或者用It is said that从句。本题的前面已经用了sth．is said，所以后面只能是不定式，但是要注意不定式动词的形式。由于句子后面的时间状语是over the past few years，为表示一段时间的状语，所以不定式要用完成时，表示该状态是在is said之前延续了一段时间，所以答案为D项。