I
1 b packed
2 a use
3 c useful
4 a recycle
5 e environment
6 b protective
7 a protection
8 c pollution
9 b prohibition
10 a prohibit
II
1 b
2 a
3 e
4 c
5 d
III
1 d
2 c
3 e
4 a
5 b
IV
1 -
2 -, the
3 the, the, -, -
4 the, -, -
5 the, -
6 -, -
V
1 did
2 were
3 hadn't gone
4 would have written
5 would save