题目内容

The doctor tried to find out ______ that had caused the spread of the terrible disease.        

A. what it was                        
B. why it was    
C. whatever was                      
D. however was

试题答案

A
相关题目
The doctor tried to find out ______ that had caused the spread of the terrible disease.        
[     ]
A. what it was                        
B. why it was    
C. whatever was                      
D. however was
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