1) I was reading a book ______ the phone rang. a) when b) while 2) ______ we were walking in the park, it started to rain. a) When b) While 3) I was cooking dinner ______ my friends arrived. a) when b) while 4) ______ she was studying, her brother was playing loud music. a) When b) While 5) I saw a strange man ______ I was waiting for the bus. a) when b) while 6) They were driving to the beach ______ they had a flat tire. a) when b) while 7) I was talking to my teacher ______ you called me. a) when b) while 8) The kids were playing outside ______ it got dark. a) when b) while 9) ______ I was trying to sleep, my neighbor was making noise. a) When b) While 10) He hurt his knee ______ he was playing football. a) when b) while

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