问题

The windows must have taken you quite a long time that day—– RightThey ______ for months
A:haven’t been cleaned
B:didn’t clean
C:hadn’t been cleaned
D:haven’t cleaned
B:didn’t clean
C:hadn’t been cleaned
D:haven’t cleaned
正确答案是:
同类题型
You’d better check your bills_____ any error when shopping in the supermarket[ ]
Tom _________ his father and his father __________ very young.
Your father is sleeping. Don’t ______, will you–No, I won’t.
This piece of music ____ him ____one of the most popular singers.
any years after his divorce, hestill couldn’t figure out the reason for his ____ marriage.