Charles Babbage is generally considered ________ the first computer.   [     ]A.

Charles Babbage is generally considered ________ the first computer.   [     ]A.

题型:浙江省同步题难度:来源:
Charles Babbage is generally considered ________ the first computer.   [     ]
A. to invent        
B. inventing   
C. to have invented    
D. having invented
答案
C
举一反三
This problem is said _____ three times.  [     ]
A. to have been talked      
B. to have discussed  
C. having been discussed    
D. to have been talked about
题型:浙江省同步题难度:| 查看答案
Everybody believed the man ______ away the diamond ring.  [     ]
A. be taken  
B. taking  
C. to take  
D. to have taken
题型:浙江省同步题难度:| 查看答案
AIDS is said________the biggest health challenge to both men and women in that area over the
past few years.  [     ]
A. that it is                  
B. to be
C. that it has been            
D. to have been
题型:同步题难度:| 查看答案
Jack is said____    for a fortnight  since he went to bed.[     ]
A. to sleep    
B. to be sleeping  
C. to be slept    
D. to have been sleeping
题型:期末题难度:| 查看答案
The student you considered ______ hardest failed to pass the important examination.     
A. to have studied  
B. having studied  
C. to study  
D. studying
题型:同步题难度:| 查看答案
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