50. Jack is on the stage, I guess he (dance)_____________________
51. Bill (read)____________________in the garden when the dog (jump)________________on him.
52. He felt asleep while he (do)____________________ his homework.
53. We (not see) ________________________them for a long time.
54. It (rain)________________________ when we arrived.
55. Next Friday, Kite and I (wait) _________________right here until you get back.
56. He’ll leave as soon as he (hear) ____________________the news.
57. Rosie (never/ sing)___________________in front of such many people before.
58. How long you (study)_________________________ in this school?
59. We (not receive)__________________ any letter from him since he (leave) ___________four months ago.
60. Where are you?~ I’m upstairs. I (have)______________________ a bath.