Where ________ Mary have put the empty bottles? -She ________ them away. They must be somewhere.
A: can; can't have thrown
B: must; needn't
C: must; must have thrown
D: can; mustn't have thrown
A: can; can't have thrown
B: must; needn't
C: must; must have thrown
D: can; mustn't have thrown
举一反三
- “____ he have left yesterday?” Yes, he ____<br/>yesterday.” No, he ____ yesterday.” A: Must; must have left; can’t have left B: Can; can have<br/>left; can’t have left C: Can; must have left; can’t have left D: May; must<br/>have left; shouldn’t have left
- Ellie __________ to the beach. She hates being in the sun. A: can't have gone B: must have gone C: mustn't have gone D: can't go
- ——May I go now？----No, you ____ . You ____ stay here. A: needn't； has to B: mustn't； have to C: can't； must D: needn't； must
- It must have rained last night, ______ it A: mustn' t B: can' t C: didn' t D: needn' t
- It ____ just now. The playground is dry. A: can't have rained B: can have rained C: mustn't have rained D: must have rained