问题
Is it your brother playing football outside? — It ________ be him. He is helping mother with dishes now.
A:must
B:can’t
C:mustn’t
D:can
B:can’t
C:mustn’t
D:can
正确答案是：
同类题型
Must I return the story book tomorrow, madam? –No, you ______ bring it here next Monday.
She often helps the old ____ their housework.[ ]
Peter is ______honest boy and he often tells me ______.
Just as Professor Scotti often______ it, success is ninety-nine percent mental attitude.
Tom, you get dead drunk again!—_______? It’s none of your business.