III:
1: A
2: B
3: C
4: D
5: A
6: A
7: C
8: D
9: B
10: B
IV:
1: ride -> will ride
2: hers -> her
3: your -> yours
4: friendly environmentally -> environmentally friendly
5: many -> much
6: me -> mine
7: invention -> inventions
8: their -> theirs
9: in future -> in the future
10: there are still traffic jams -> still traffic jams be
