26. You had better join the team.

27. Unless you help me, I won't carry out the test on time.

28. The girl wouldn't have made so many mistakes yesterday if she had looked through the rules before the test.

29. If they spent more time on their studies now, their results could be much better.

30. If Susan doesn't turn up, we will have to inform her relatives.

31. I heard of Peter's being appointed chief supervisor by our authorities.

32. Excuse my asking but does everyone in your family approve of your flying?

26. b

27. c

28. d

29. c

30. b

31. b

32. b