问题
Someone is knocking at the door. Is it Ann?—It _____ be her. She is giving a performance at the theatre now.
A:may
B:must
C:can’t
D:mustn’t
B:must
C:can’t
D:mustn’t
正确答案是：
同类题型
When the old man died, it that she was actually rich.
How do people usually ___________ in the office?
How do you study Chinese so well?-_________ reading plenty of books.[ ]
Nancy enjoyed herself so much she visited her friends in Sydney last year.[ ]
Linda，I am very thirsty.—Let’s go to the nearest supermarket some drink, OK?