问题
Listen ! Helen is singing in the next room.—It _______ be Helen. She has gone to Beijing.
A:can’t
B:mustn’t
C:may
D:should
B:mustn’t
C:may
D:should
正确答案是:
同类题型
What about the English test yesterday?—I never did so______. I’m sure I can do very well.
When did you ______? — ______ the morning of November 20th.
May I speak to the headmaster?—He ____ a meeting now. Can I take a message?
We have to ____ ourselves when we are away from home.
I hear Sam has gone to Qingdao for a holiday.—Oh, how nice! Do you know when he________?