1) 1. ______ my father was reading a book , my mother looked at the family album. a) When b) While 2) 2. I was having a shower ______ my friend broke my mother's favourite vase. a) when b) while 3) 3. ______ the teacher came into the classroom ,some students were arguing with each other. a) When b) While 4) 4. I arrived home ______ all the guests were having tea and biscuits. a) when b) while 5) 6. What were you doing ______ the teacher looked at you suddenly? a) when b) while 6) 8. The electricity went off ______ we were watching a horror film. a) when b) while 7) 9. Mr.Robinson fell off the tree ______ he was looking at the little bird's nest. a) when b) while 8) 10. I was doing homework ______ my mother knocked at the door. a) when b) while

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