Task 4. Choose the correct verb.
c) may
1. Tommy .... ......be at home but I'm not sure.
a) must b) can't
c) may
2. His face is red. He..
.....be furious.
a) must b) can't
3. You ....
..hurry, we've got plenty of time.
a) mustn't b) don't have to
c) may
4. Arthur......
...be a pianist. He's almost deaf.
a) must b) can't
c) may
5. In England you...
.....drive on the left.
a) can b) have to c) must
6. Sheila .....
be at work now. She's just gone on holidays.​