单选题:The country has already sent upthree unmanned spacecrafts, t..

题目内容:
The country has already sent upthree unmanned spacecrafts, the most recent at the
end of last March. [ ] A.has been launched
B.having been launched
C.being launched
D.to be launched
参考答案:

Recently a survey ________ prices of the same goods in two d..

Recently a survey ________ prices of the same goods in two different supermarkets has caused heateddebate among citizens.[ ]A. comparedB. comparingC. comparesD. being compared

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____ at a decision, they immediately set to work. [ ]A. Ar..

____ at a decision, they immediately set to work. [ ]A. ArrivingB. ArrivedC. Having arrivedD. Having been arrived

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Examples of people____ by lightning more than five times are..

Examples of people____ by lightning more than five times are almost common. [ ]A. strikingB. to be struck C. being struckD. struck

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He asked who was the man ____ on. [ ]A. to be operating B...

He asked who was the man ____ on. [ ]A. to be operating B. operating C. to operate D. being operated

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The old man, ____________ abroad for twenty years,is on the ..

The old man, ____________ abroad for twenty years,is on the way back to his motherland[ ]A.towork B.working C.tohaveworked D.havingworked

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