1) We often use ________ before Past Simple a) while b) when 2) I was having lunch _____ James arrived. a) when b) while 3) _____ I heard the doorbell, I went to the door. a) When b) While 4) ____ John was washing her hair, I did my homework. a) When b) While 5) I was in the shop __________ someone stole my bag a) when b) while 6) We often use ________ before the past continuous a) When b) While 7) I was at the baker's _____ I met Jo. a) when b) while 8) The customer was being helped by the salesman ____ the thief came into the store. a) when b) while 9) ____ you saw Keith, was he with Jo? a) When b) While 10) I was in the shop _____ someone stole my bag. a) when b) while 11) I hurt my back ____ I tried to lift the piano. a) when b) while 12) ____ we were standing outside the cinema, someone picked my pocket. a) When b) While 13) _____ Mrs Scott came back to her hotel, she called the elevator a) When b) While 14) ___________ he was still riding, he put his arms ups to celebrate a) While b) When 15) One of the players was hitting th eball _____________ a bird flew in. a) while b) when 16) _________ I opened the gate of the garden, my parents were cooking breakfast. a) When b) While 17) I saw him ___________ I was on my way home. a) when b) while 18) ______________ I was speaking, they were thinking of something else. a) When b) While 19) My father was waiting in the car, ___________ my mom was doing shopping a) when b) while 20) __________ you saw Paul, was he with Anne? a) When b) While

Use of When and While

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