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There is no doubt _______ they had got the bad news. They looked so sad.

A. if  
B. how  
C. that    
D. why
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科目:高中英语 来源:河北省期中题 题型:单选题

There is no doubt _______ they had got the bad news. They looked so sad.
[     ]
A. if  
B. how  
C. that    
D. why

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