问题

The window is dirty.—-I knowIt ______ for weeks
A:hasn’t cleaned
B:didn’t clean
C:wasn’t cleaned
D:hasn’t been cleaned
B:didn’t clean
C:wasn’t cleaned
D:hasn’t been cleaned
正确答案是:
同类题型
During his stay in the USA, Yao Ming said that he would go back to China ______ he was needed.
We attend lectures in the school lecture hall atweekend ____ seats more than 800 students.
He never ________ no matter how many difficulties he has.
How soon will you come back from your hometown—_____ three weeks.