_____ we call a machine is really a kind of tool that can do  work for man.        

A. When                                
B. That      
C. What                              
D. Which
相關(guān)習(xí)題

科目:高中英語 來源:同步題 題型:單選題

_____ we call a machine is really a kind of tool that can do  work for man.        
[     ]
A. When                                
B. That      
C. What                              
D. Which

查看答案和解析>>


同步練習(xí)冊答案