题目内容

The widespread of super-hybrid rice around the world ______the lives of millions and millions of
people suffering from hunger to a great level.
[     ]
A. improved    
B. is improving  
C. has improved  
D. has been improving
C
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相关题目
He moved to Beijing in 1990 and________there from  then on.
[     ]
A. lives  
B. has lived
C. lived  
D. is living
—Don't forget to post the letter, will you?    
— I __________ it.    
[     ]
A. would post      
B. had already posted    
C. have already posted    
D. was posting
It is hard to imagine what progress they _____ in the past few months.  
[      ]
A. made  
B. have made  
C. had made  
D. make
Mum, I arrived at the train station twenty minutes ago, but Betty          up yet.
[     ]
A. hadn't turned
B. won't turn
C. hasn't turned
D. didn't turn
Seventy percent of the students _____ taken part in the work and seventy percent of the
work _____been finished.
[     ]
A. has, has  
B. had , had  
C. has, have    
D. have, has
— Do you know our town?  
— No, this is the first time I____here.  
 [     ]
A. was    
B. are coming    
C. came    
D. have come
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
My dictionary______ . I have looked for it everywhere but still _____ it.

[     ]

A.  has lost; don't find
B. is missing; don't find
C. has lost; haven't found
D. is missing; haven't found

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