用when, as, while填空: 1.My mother was reading newspaper in the house ________ someone knocked at the door loudly. 2._______ she grew older and older, she became more and more beautiful. 3.My sister was reading a book ________ she was listening to the music. 4.The driver was about to drive away ________ he saw a shoe 0drop on his car. 5._______ there is life, there is hope. 6._______ she was driving along the road, she saw something huge in front of her. 7.Please let us know ________ you are ready. 8.you trust to the dog, the wolf slips into the sheepfold（羊圈）. 9. the wind blows you must set your sail. 10. We took notes ________ we listened. 参考答案: 1.when 当主句是进行时，when有突然意外的意思。 2.As 随着 3.as 一边…一边… 4.when 当…时 主从句同时发生 5.When 此句是谚语when等于if 6.While 表示一个时间段 7.when 表示一个时间点 8.While 表示一个时间段，这是句谚语，意思是不要过分相信别人或依赖别人。 9.As 指从句动作紧跟着主句动作发生，该句是谚语，乘风扬帆，趁热打铁。 10.as 一边…一边…