If nothing________，the oceans will turn into fish deserts. (2013·湖南
题型：不详难度：来源：
If nothing________，the oceans will turn into fish deserts. (2013·湖南，26)| A．does | B．had been done | | C．will do | D．is done |
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答案
| D |
解析
考查动词的时态和语态。句意为：如果什么都不做的话，海洋将会变成鱼的沙漠。根据“主将从现”的原则，从句用一般现在时。再根据语境可知此处表示被动。故选D项。 |
举一反三
—I don’t understand why you didn’t go to the lecture yesterday afternoon.
—I’m so sorry.But I________my homework. (2013·湖南，34)| A．had done | B．was doing | | C．would do | D．am doing |
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—Oh no！We’re too late.The train________.
—That’s OK.We’ll catch the next train to London. (2013·山东，27)| A．was leaving | B．had left | | C．has left | D．has been leaving |
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The girl has a great interest in sport and ________ badminton classes twice a week over the last three years. (2013·福建，26)| A．took | B．is taking | | C．takes | D．has been taking |
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I felt very tired when I got home，and I ________ straight to bed. (2013·重庆，21)| A．go | B．went | | C．had gone | D．have gone |
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The letters for the boss________on his desk but he didn’t read them until three days later. (2012·天津，2)| A．were put | B．was put | | C．put | D．has put |
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