1) you ... go home.It's getting late.
a)should
b)can
c)mustn't
2)Help him!He ... swim!
a)shouldn't
b)can't
c)don't have to
3)You ... stay on the main path,but it's a good idea.
a)shoudn't
b)mustn't
c)don't have to
4)You ... go out without your mobile.What if you get lost?
a)don't have to
b)can't
c)shouldn't
5)We ... leave immediately.The tsunami is coming.
a)mustn't
b)have to
c)can
6)I've broken my leg.You ... leave me here on the mountain.
a)mustn't
b)can
c)don't have to