– Look at these factories. I hate them. They____ many rivers here. --Yes. Someth
题型:不详难度:来源:
– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.A.polluted, must do | B.had polluted , must be doing | C.have polluted , must be done | D.were polluting, must be done |
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答案
C |
解析
试题分析:句意:看看这些工厂。我讨厌它们,它们已经污染了很多这里的河水。是的,必须做一些事情来阻止污染。根据语境,应该用现在完成时表示已经做了某事,一些事情必须被做,情态动词的被动形式must be done,故选C 点评:动词的时态是学习英语过程中非常重要的知识。现在完成时表示动词在过去发生对现在造成的影响。现在完成时往往和already,yet,for+一段时间,since+点时间的时间状语连用。一般过去时只表动词在过去发生,一般现在时表示习惯性的动词或是客观真理、事实。 |
举一反三
Don’t make any noise. The pandas over there. A.are sleeping | B.have slept | C.will sleep | D.were sleeping |
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---What did Alice say? ---She said she me at eight o’clock tomorrow morning.A.is calling | B.was calling | C.will call | D.would call |
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Half of her time in the library.A.spends on books | B.is spent reading books | C.has paid for reading books | D.is spending to read |
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I don’t know if he _____ tomorrow. If he _____, I’ll go to see him.A.leaves; gets up | B.will go; will go | C.will come; comes | D.is arriving; leaves |
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I ________the day before yesterday, I’ve _________for 2days.A.arrived,come back. | B.reached, returned | C.got, returned back | D.arrived, been back |
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