31. In three weeks there was a great improvement in Michael's health.

“I haven't been to Zurich since 1991,” Tom told me.

33. She always gave her sons good advice.

34. Your only reason for marrying me was because I can cook.

35. I came to London on the Shuttle.

36. That topic was brought up by Sophie at last month's meeting.

37. If they were propery trained, their work would be better.

38. I think it is time I left.

39. He crossed the road without looking left or right.

40. John blamed his secretary for the mistake.