It is well known to us all that a lot of rivers _______by factories.A．are pollut
题型：不详难度：来源：
It is well known to us all that a lot of rivers _______by factories.| A．are polluting | B．have been polluting | | C．are being polluting | D．are being polluted |
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答案
| D |
解析
| 考查时态语态，river和pollute是被动关系，但四个选项只有D项是现在进行时的被动，句意是：众所周知的是很多河流正在被工厂污染。选D。 |
举一反三
— Mom, where is my lunch pack?
— Just where it _____. | A．has been | B．had been | C．was | D．be |
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The whole class________ the teacher attentively.| A．are listening to | B．is listening to | | C．are listening | D．is listening |
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Since then the number of people taking driving lessons ________ 20％. | A．has increased to | B．increases by | C．has increased by | D．have increased by |
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Would you please keep silent? The weather report ______ and I want to listen to it.| A．is broadcast | B．has been broadcast | C．is being broadcast | D．had been broadcast |
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Great changes _________ in my hometown in the past 20 years.| A．took the place | B．have taken place | C．were taken place | D．took place |
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