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题目
题型:不详难度:来源:
This robot is supposed to save a lot of labor, but it remains a problem if it ______.
A.isB.savesC.doesD.has

答案
C
解析
do(es) 是代动词,用来代替上文save a lot of labor。
核心考点
试题【This robot is supposed to save a lot of labor, but it remains a problem if it __】;主要考察你对过去进行时等知识点的理解。[详细]
举一反三
In a few years’ time, there ______a lot of trees around the house.
A.will have.B.will be C.are haveD.have.

题型:不详难度:| 查看答案
----When __________ they leave here ? ----Next Monday.
A.doB.willC.doesD.are.

题型:不详难度:| 查看答案
— Did you watch the programme I Am a Singer on Friday night? It was wonderful.
— I wish I had, but I ____________ for the mid-term examination.
A.preparedB.was preparingC.had preparedD.would prepare

题型:不详难度:| 查看答案
There _________a book and three pens on my desk just now,but now there is nothing on it.
A. had                   B. were                 C. was
题型:不详难度:| 查看答案
They are living with their parents for the moment because their own house ____.
A.is being rebuiltB.has been rebuiltC.is rebuiltD.has rebuilt

题型:不详难度:| 查看答案
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