Susan' s parents have bought a large house with a swimming pool. It ______be very expensive.
A: must
B: can
C: mustn' t
D: can' t
A: must
B: can
C: mustn' t
D: can' t
举一反三
- They ______ because the light's on! A: must have gone out B: can't have gone out C: mustn't have gone out D: can't go out
- 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
- It is cold in the room. They ____ have turned off the heating. A: must B: can C: mustn’t D: can’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
- 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