Since the time humankind started gardening, we _____to make our environment more
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Since the time humankind started gardening, we _____to make our environment more beautiful.A.try | B.have been trying | C.are trying | D.will try |
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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。 |
举一反三
Whenever you a present, you should think about it from the receiver’s point of view.A. bought | B.have bought | C.will buy | D.buy |
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