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18．You________me up so early.I don't have to go to school today and I can sleep for more hours. A．needn't wake B．don't need to wake C．needn't have woken D．didn't need to wake 答案与解析：C 题意为：你没必要那么早叫我起床，今天我不上学，可以多睡几个小时。needn't have done表示对某事的责备和批评，意为“没必要做而做了”。 19．All my family are looking forward to meeting you.You ________come over and have dinner with us this weekend. A．Will B．must C．may D．shall 答案与解析：B 题意为：我家所有人都盼望和你见面，这个周末你一定要过来和我们共进晚餐。根据题意可知选must“必须”。 20．—This________John's car.Its number is AC506. —I don't think so.He said a small white car but this is a small yellow one. A．can't be B．must be C．may not be D．should be 答案与解析：B 题意为：“那一定是约翰的汽车，车牌是AC506。”“我认为不是。他说他的是一辆白色的小轿车，但这是一辆黄色的。”根据题意可知是表示对现在肯定的推测，故选B。 21．Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every driver________obey in this city. A．shall B．can C．ought to D．need 答案与解析：A 题意为：无论是小汽车、公共汽车还是卡车，在这个城市里年检两次是每位司机应该遵守的规定。当表示按要求“必须，应该”做的事并且主语是二、三人称时只能用shall。 22．Last night I tried to call on you but your dog simply________not let me come through the gate. A．might | 
