2.
1, mustn't
2, must
3, mustn't
4, must
5, mustn't
6, mustn't
1.
You must test toys before you give them to your child.
You must throw away the package.
You must throw away the ribbons.
You mustn't let let small children play alone.
You mustn't leave metal toys outside.
You must avoid toxic toys.
4.
1-d
2-e
3-b
4-a
5-c
5.
1, leave
2, didn't go
3, visited
4, had
5, weren't
6, wrote