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 |
推荐套卷
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 |