1) Use ? to link a short action and a long action which happened at the same time in the past. a) When b) While 2) Use ? to link two long actions which happened at the same time in the past. a) While b) When 3) ? I was reporting the incident to the police, she was climbing towards an open window on the second floor. a) While b) When 4) I was reporting the incident to the police ? she was climbing towards an open window on the second floor. a) while b) when 5) I was walking along the street opposite the school ? I saw a woman in black clothes climbing up the scaffolding like a cat. a) when b) while 6) ? the burglar came out from the window, the police were waiting for her. a) When b) While 7) She was waiting for the train ? the pickpocket stole her wallet. a) when b) while

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