问题
His sister left home in 1998, and ____________ since.
A:had not been heard of
B:has not been heard of
C:had not heard of
D:has not heard of
B:has not been heard of
C:had not heard of
D:has not heard of
正确答案是：
同类题型
We’re going on a school trip tomorrow.—______.
Not only I but also Jane and Kate ___ tired of reading one book after another.
_My parents always tellme_______others late at night._They are right. It’s not polite.
I failed in the final examination last term andonly then ________ the importance of studies.