1 You... go until the light turns green might not
can't
needn't
ought not
2 You .. drive me to the airport, I can take a taxi
might not
can't
needn't
ought not
mustn't
don't have to
3. I... pick the tickets up because the airline has posted them to me. *
might not
can't
needn't
ought not
mustn't
don't have to
4 I come on the trip with you,
please? *
might
can
need
must
5.They to get vaccinated before going to Africa. *
ought
can
need
must
have to
6 They can/must get the underground as it's quicker than the bus. *
ought
can
need
must
have to
7. I order a taxi from here? *
ought
can
need
must
have to
may
8 He .. come with us because he's got a doctor's appointment today. *
can't
needn't
mustn't
have to
