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题目
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,这儿构成(keep sth. doing)。
核心考点
试题【They use computers to keep the traffic _____ smoothly. A.being runB.runC.to runD】;主要考察你对现在分词等知识点的理解。[详细]
举一反三
.________ not to miss the flight at 15:20, the manager set out for the airport in a hurry.
A.RemindingB.Reminded
C.To remindD.Having reminded

题型:不详难度:| 查看答案
Most people in that area objected with little effect______a golf playground there.
A.to buildB.of buildingC.to have builtD.to building

题型:不详难度:| 查看答案
--- Who should I send this message to ?   
--- The mayor is the one ____ ?
A.to send itB.to be sentC.for sendingD.to send it to

题型:不详难度:| 查看答案
I"ll have you _______ English in six months .
A.speakingB.speakC.spokenD.be able to speak

题型:不详难度:| 查看答案
We are only___ glad to do anything we can ___ her.
A.too, to helpB.very, helpC.too, helpD.very, helping

题型:不详难度:| 查看答案
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