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题目
题型:不详难度:来源:
Since the time humankind started gardening, we _____to make our environment more beautiful.
A.tryB.have been trying
C.are tryingD.will try

答案
B
解析

试题分析:考查动词时态。since 作为介词,后接某一确定的时间点,主句谓语动词是持续性动词,常与现在完成时态、现在完成进行时态或过去完成时态连用。句意:自从人类开始园艺,我们一直尽力使我们的环境更美丽。故B正确。
核心考点
试题【Since the time humankind started gardening, we _____to make our environment more】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
Whenever you     a present, you should think about it from the receiver’s point of view.
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题型:不详难度:| 查看答案
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—Well, the media ________ it in a variety of forms.
A.cover B.will cover C.have covered D.covered

题型:不详难度:| 查看答案
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A.remember B.remindC.recover D.recall

题型:不详难度:| 查看答案
----Tony, why are your eyes red?
---I __ up peppers for the last five minutes.
A.cutB. was cuttingC. had cutD.have been cutting

题型:不详难度:| 查看答案
Writing out all the invitations by hand was more time-consuming than we______.
A.will expectB.are expectingC.expectD.had expected

题型:不详难度:| 查看答案
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