Choose the correct item.
1 The last bus had left so Chris ..... walk home.
A must
B has to
C had to
2 We travel on public transport if we haven't got a ticket.
A might not B don't need to
C are not allowed to
3 You ..... put on your coat. It's really warm outside.
A don't have to B can't
C don't need
4 Let's leave for the airport early because we
on the way
run into traffic
A can
B may
C must
5 Tourists respect the local customs and traditions of the
places they visit.
A are allowed to
B might
C should
6 Emily to put up her tent with the help of some other
campers.
A was able to
B must
C could​