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题目
题型:不详难度:来源:
—Must we keep the window open all the time? 
A. No, you mustn’t  B. No, you can’t.   C. No, you don’t have to.
答案
C
解析
考查情态动词的用法。句意“我们必须一直开着窗户吗?”mustn’t“禁止,不许”;can’t“不可以”;don’t have to“不必”,相当于needn’t。故选C。
核心考点
试题【—Must we keep the window open all the time?  A. No, you mustn’t  B. No, you can’】;主要考察你对一般疑问句等知识点的理解。[详细]
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