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

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