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1.What was the girl doing when the UFO took off?(P19)飞碟起飞时那个女孩正在做什么?take off在句中作"起飞"解。如:The plane took off at7am.(飞机是清晨七点起飞的。)take off还可以作"脱下(衣、帽、鞋等)"、"拿掉"解。如:Take off your coat and sit down.(先脱掉你的外套,然后再坐下。)