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A．单句填空 1．—Can't you stay a little longer? —It's getting late. I really________ go now. My daughter is home alone. 答案 must [句意：——你就不能多待一会儿吗？——天越来越晚了。我现在真的必须走了。我女儿一个人在家里呢。根据答语中的“It's getting late.”以及“My daughter is home alone.”可知，这里表示必须离开，故用must。] 2．You________ be careful with the camera. It costs! 答案 must [句意：你一定要小心这个相机。它很贵的！根据语境可知，此处表示“一定”，故用must。] 3．You________ feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it. 答案 may [句意：你可能感觉到所有的培训都是浪费时间，但是我百分之百的确信最后你将感谢你所做的这一切。根据句子中的“but I'm a hundred percent sure later you'll be grateful you did it”可判断出，表示对前面情况的一种推测，表示“也许，可能”，故用may。] 4．—I've prepared all kinds of food for the picnic. —Do you mean we ________bring anything with us? 答案 needn't [句意：——我已经为野餐准备好了各种食物。——你的意思是说我们不必再带任何东西了吗？根据上下文可知此处表示“不必”，故用needn't。] | 
