Give the correct tense of the verbs in brackets
31. Tom and I (know) each other since we were at school.
32. She had tried for a long time before she (succeed)
33. The baby (not stop) crying until he was fed.
34. It was difficult for me to eat American food when I (be) in New York.
35. The accident happened while he (drive) on a highway.
36. Mary (not come) until you are ready.
37. Tom said that he would lend me money whenever I (need) it.
38. When the student heard the bell, they (stand) up and (leave)
39. The old lady fell as she (go) downstairs.
40. Helen will help you as soon as she (finish) that letter.
41. Tom (sit) in a cafe when I saw him.
42. Since I (be) a child, I have developed an interest in wild animals.
43. We will send you the goods as soon as we (receive) your cheque.
44. By the time you (give) the children their meal, your dinner will be cool.
45. After Jane (finish) her degree, she intends to work in her father's company.
46. Jenny Tran (never hear) about Halloween before she came to the US.
47. I'll take the paper with me. I'll read it while I (wait) for the bus.
48. When the light went out, I (light) some candles.
49. The message arrived after I (leave).
50. By the time my mother retires, she (save) 20,000 US dollars.