I can’t believe it. She ___ it by herself. It weighs over a ton.
A.couldn’t lift
B.might not lift
C.may not have been able to lift
D.can’t have lifted

It’s the_____________ building that I’ve ever seen.
A.higher 
B.height  
C.highest 
D.most high

“Must I take my umbrella?” - “No, you ___. It’s not going to rain.”
A.mustn’t
B.have to
C. needn’t
D.don’t

It’s absurd! In the first section they praise us for preventing a “major epidemic” and in the next one they write that we ___ so many people.
A.needn’t have vaccinated
B.didn’t need to vaccinate
C.didn’t need vaccinate
D.needn’t to have vaccinated

She ___, but luckily, a lifeguard spotted her and rescued her.
A.has drowned
B.ought to drown
C.could have drowned
D.might drown

We really should have checked whether the covered bazaar is open on Sundays. We ___ somewhere else, but now we’ve wasted our afternoon coming here.
A.visited
B.had visited
C.could have visited
D.have been visiting

If you like, we ___ volleyball with the children while the men ___ up the barbecue.
A.could play - are setting
B.could have played - have set
C.will play - were setting
D.can play - had been setting

Initially I was opposed  to the idea, but after I had seen the research, I ___ that the project was a good one.
A.must have agreed
B.would have agreed
C.ought to agree
D.had to agree

The lamp ___ be broken. Maybe the light bulb just burned out.
A.could not
B.might not
C.must not    
D.cannot

The Prince’s aircraft had to undergo a security check and so we ___ to him for almost an hour. Father was very impressed as normally he could have counted on nothing more than a handshake.
A.might talk  
B.were able to talk
C.could have talked
D.may have talked