题目
题型:不详难度:来源:
Every possible means _______to prevent the air pollution, but the sky is still not clear.
A.are being used | B.have been used | C.has been used | D.had been used |
答案
解析
核心考点
试题【Every possible means _______to prevent the air pollution, but the sky is still n】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
I ______ on a sofa because my grandparents have come for the weekend.
A.slept | B.was sleeping | C.have slept | D.am sleeping |
The child said that he had _____ the pen on the desk, but I thought he ____ to me.
A.laid; lied | B.lain; lied | C.lied; lay | D.lain; lay |
After he had broken the world record, Rod ____ to a restaurant to celebrate with hid friends.
A.went | B.had gone | C.would go | D.has gone |
— Has Tom finished his homework yet?
— I have no idea, he _____ it this morning.
A.was doing | B.did | C.had done | D.would do |
In the past few months, a discussion ________about whether selecting “Three Goods” Students in elementary and middle schools should be cancelled.
A.has to be held | B.has been held | C.has been holding | D.was held |
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