Several man-made satellites _______ in Xichang in the past five years. [ ]A.

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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

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

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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

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Since the beginning of this year no issue _____ yet.[     ]
A. is published
B. has been published
C. will be published
D. was published

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So far, how many digital cameras _____ in your shop?[ ]

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

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Great changes _____ in our country recently.[     ]
A. have happened
B. happened
C. have been happened
D. were happened

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