They use computers to keep the traffic _______ smoothly. A.being runB.runC.to ru

They use computers to keep the traffic _______ smoothly. A.being runB.runC.to ru

题型:不详难度:来源:
They use computers to keep the traffic _______ smoothly. 
A.being runB.runC.to runD.running

答案
D
解析
考查非谓语动词。句意:他们用电脑保持交通运行流畅。现在分词作补足语表示正在进行的伴随性动作,和被修饰词是主谓关系。故选D。
举一反三
My friend showed me round the town, ______ was very kind of him.
A.whichB.thatC.whereD.it

题型:不详难度:| 查看答案
I can’t leave. She told me that I ______ stay here until she comes back. 
A.canB.mustC.willD.may

题型:不详难度:| 查看答案
I’m turning the shop_____to my son when I retire.
A.awayB.upC.overD.off

题型:不详难度:| 查看答案
–English is becoming so important.
–It’s true. Many university classes are taught in English _____ the native language is not English.
A. as if B. what if
C. as long asD. even though

题型:不详难度:| 查看答案
Although ______ for many years, the two old sisters recognized each other at once.
A.having been separatedB.being separated
C.having separated D.had been separated

题型:不详难度:| 查看答案
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