A:1 - 6 a b b b a b
B:1、water,clothes,e
2、plastic,make,d
3、wood,tables,chairs,a
4、bottles,toys,c
5、pictures,paper,f
6、oil,drive,b
C:略
D:2、should,shouldn’t
3、shouldn’t,should
4、shouldn’t,should
5、should,shouldn’t
6、shouldn’t,should
7、should,shouldn’t
E:1、There is not much water in many places.
2、What makes the bedroom messy?
3、I can reuse paper to make a box.
4、He should not smoke in the bookshop.
5、Trees help keep the air clean.
F:1 - 6