Unit 5What were you doing when the rainstorm came?,.选词填空 1.Many people were walking( walked/were walking ) with their dogs in the park at that time. 2.The accident happened( happened/was happened ) while he was running by the street. 3.I was preparing the lesson when( when/while ) he came to ask me a question. 4.What were you doing while( when/while ) I was sleeping last night? 5.Fred missed( was missing/missed ) the game because he was doing his homework at that moment.,.根据句意用所给词的适当形式填空 1.Li Mi