50, I (not know)__________ when he (die) ___________.
51, Bill said he (forget)__________ to buy a dictionary
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, Kite and I (wait)___________ right here until you get back
56, He’ll leave as soon as he (hear) _________ the news
57, Dick (start)_________ school before he (be)________ seven
58, How long you (study)__________ in this school?
59, We (not rêcive) ____________ any letter from him since he (leave)__________ four months ago
60, Where are you? I’m upstairs. I (have) _________ a bath
@dg
50. don’t know – dead
51. forgot
52. was doing
53. haven’t seen
54. was raining
55. have been waiting
56. hears
57. started – was
58. have you studied
59. haven’t received – left
60. am having
50. do not know / died
51. forgot
52. was doing
53. have not seen
54. was raining
55. have been waiting
56. hears
57. has started / was
58. have you studied
59. have not recieved / left
60. am having