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

D。

解析:

“某人(某物)+is said+不定式”是一个很有用的句式，其意为“据说”，又如：The company is said to be in trouble. 据说这家公司遇到了困难。再根据句中的over the past few years可知，不定式要用完成式。