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
A: must have turned off
B: must turn off
C: can’t have turned off
D: may turn off
举一反三
- It is cold in the room. They ____ have turned off the heating. A: must B: can C: mustn’t D: can’t
- 1. It is cold in the room. They ______ have turned off the heating.
- ___ the heating off? It's really cold in here. A: Do they turn B: Have they turned
- I thought I ____ the light, but it is still turn on. A: had turned off B: was turning off C: have turned off D: would turn off
- Don't forget ______ the light when you leave. A: turn off B: to turn off C: turning off D: turned off