–Sorry, Professor Smith. I didn’t finish the assignment yesterday. --Oh, you _____ have done it as yesterday was the deadline. A. must B, mustn’t C, should D. shouldn’t
To be honest, I would agree with Shirley, though not _____.
The boss didn’t _____ to the workers’ request for increasing their wages(工资).
This was the first time we_____ a film in the cinema together as a family.
---What’s wrong with him? He is so sad. ---He was ____ at not being invited to the party.
____ number of students were absent from the meeting and ____ number of them is only about fifty .