1)bob doesn't __ wake up early to go to scholl tomorrow.It's a holiday.
a.has to b.must c.have to d.need
2) We __ be late,because we will miss our flight.
a.don't have to b.don't need to c.needn't d.mustn't
3)I'm afraid that you __ leave your bicycle here.
a.might not b.needn't c. don't need to d. can't