--They are supposed to arrive at six, but there is still no sign of them.--Something unexpected ______ to them.
A: might happen
B: must have happened
C: would have happened
D: could happen
A: might happen
B: must have happened
C: would have happened
D: could happen
举一反三
- I'm pretty sure none of this ______ if I hadn't been fired from Apple. A: would happen B: would have happened C: happened D: have happened
- He kept his head. Otherwise, the accident . A: would happen B: happened C: would have happened D: happens
- Something unexpected happened, so I have to _________ my departure.
- I don’t know what ______ at the last meeting. A: happen B: to happen C: is happened D: happened
- Peter __________ at home that day. A: happened B: happen to be C: happened to D: happened to be