The dangerous building could fall down any time, but that’s a risk we’ll have to_____.
| A．do | B．take | C．perform | D．make |
— They have discussed the problem for hours.
— Have they come to any_____?
| A．end | B．result | C．opinion | D．conclusion |
—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 |
He failed in the exams and only then _____ how much time he had wasted.
| A．he realized | B．did he realize | C．he had realized | D．had he realized |
This ticket _____ one adult and one child to the show.
| A．promises | B．enters | C．admits | D．includes |
— Isn’t it hard to drive downtown to work?
—Yeah, that’s why I ______ to work by train.
| A．have gone | B．have been going | C．was going | D．will have gone |