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题目
题型:同步题难度:来源:
Several man-made satellites _______ in Xichang in the past five years. [     ]
A. have sent  
B. have sent up  
C. has been sent up  
D. have been sent up
答案
D
核心考点
试题【Several man-made satellites _______ in Xichang in the past five years. [     ]A.】;主要考察你对现在完成时等知识点的理解。[详细]
举一反三
-It"s difficult for the village children to cross the river for school.
- I think a bridge _________ over the river.    [     ]
A. was built    
B. is being built  
C. should be built  
D. has been built
题型:同步题难度:| 查看答案
Two manned spacecraft _____ into space in China in the past few years.[     ]
A. was sent
B. has been sent  
C. are sent
D. have been sent
题型:同步题难度:| 查看答案
Since the beginning of this year no issue _____ yet.[     ]
A. is published  
B. has been published
C. will be published  
D. was published
题型:同步题难度:| 查看答案
So far, how many digital cameras _____ in your shop?[     ]

A. are sold
B. will sell
C. sold
D. have been sold

题型:同步题难度:| 查看答案
Great changes _____ in our country recently.[     ]
A. have happened  
B. happened
C. have been happened  
D. were happened
题型:同步题难度:| 查看答案
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