28.The exercises are extremely difficult, but half of the class them ahead of time. A.has already finished B.will finish C.have already finished D.finishes 查看更多

 

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The exercises are extremely difficult, but half of the class_____ them ahead of time.   
 [     ]
A. has already finished    
B. will finish    
C. have already finished    
D. finishes

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The exercises are extremely difficult, but half of the class         them ahead of time.

A.has already finished                                     B.will finish

C.have already finished                                   D.finishes

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