1)don't have to
2) have to wear
3)must
4)may
5)don't have to
6)may
1) Did, go, did
2)Did, buy, didn`t
3)Did, do, didn`t
4)Did, eat, did
5)Did, write, did
6)Did, break, didn`t
1) a
2) b
3) c
4) b
5) d
6) a
.......