—I saw Helen in the library this morning. —No, it _________ her. She moved to France last week. A. can’t be B. can be C. mustn’t be
I really don’t know____________.
It’s _______ to work out the math problem. You needn’t go to ask the teacher.
The blouse ______ me 200 yuan.
Do you find _______ difficult to be independent(独立的)?.
There will _______ free time in the future.