Writing:
13. inconvenience
14. disconnected
15. computed
16. pollutants
17. The lorry crashed into a bus-load of school children, six of whom were slightly injured.
18. The students who wrote these two papers made a lot of mistakes.
19. They rowed across the Atlantic, which had never been done before.
20. Elizabeth, whose job involves lots of travelling, is away from home a lot.
1. D
2. B
3. C
4. C
5. A
6. A/C
7. B
8. D
9. A
10. C
11. B
12. C