He must be helping the old man to water the flowers, ____?
A: is he
B: isn’t he
C: must he
D: mustn’t he
A: is he
B: isn’t he
C: must he
D: mustn’t he
举一反三
- He must be ill, ______?: doesn’t he|isn’t he|mustn’t he|needn’t he
- He must be in the library now, ____? A: doesn't he B: mustn't he C: needn't he D: isn't he
- He must be in the classroom, _______ he? A: mustn’t B: can’t C: isn’t D: can
- He must have been very depressed when he heard the news, A: mustn't he B: haven't he C: wasn't he D: didn't he
- He knows so much about the story. He must have read the book,（） A: mustn't he B: hasn't he C: doesn't he D: didn't he