I suppose Michael ...... at home. He's not answering his phone at all.
can't be
must be
mustn't be
can be
The surgeon ...... the operation this morning. He's too drunk to hold a knife in his hands.
can't perform
can perform
mustn't perform
must perform
We believe the newly appointed trustee ...... under such stressful conditions. He's quite a gentle person who will break down if put under too much pressure.
can't work
can work
mustn't work
must work
The cat ...... on fish alone. It needs some other food too.
can't live
can live
mustn't live
must live
I'm positive our former English teacher ...... of any other woman but Lilly with whom he's been in love for years now.
can't think
can think
mustn't think
must think
The fortune teller ...... people the truth all the time. I believe she tells lies from time to time as well.
can't tell
can tell
mustn't tell
must tell
The brave mountain rescue service workers ...... the two injured men all by themselves. It's simply too much to ask of them.
can't carry
can carry
mustn't carry
must carry
The racing drivers ...... their machines so quickly as they're driving at a really fast speed.
can't stop
can stop
mustn't stop
must stop
The broadcaster ...... on the air all night long unless she wants to lose her job.
must stay
mustn't stay
can't stay
can stay
The journalists ...... up the good work. I'm sure they can do anything they like, really.
must keep
mustn't keep
can't keep
can keep
The government ...... something about the rising unemployment rate in our country. If they fail to do the trick, they're likely to face the consequences in the next election.
must do
mustn't do
can't do
can do
Our bus driver ...... a lot of experience. You can tell that he knows how to get around the city.