It is cold in the room. They ____ have turned off the heating.
A: must
B: can
C: mustn’t
D: can’t
A: must
B: can
C: mustn’t
D: can’t
举一反三
- It is cold in the room. They ________ the heating. A: must have turned off B: must turn off C: can’t have turned off D: may turn off
- 1. It is cold in the room. They ______ have turned off the heating.
- 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
- Look! The traffic light has turned red. We___ stop and wait .() A: can B: can’t C: must D: mustn’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