(2013·湖南，26)If nothing________，the oceans will turn into fish deserts.A．doesB．ha
题型：不详难度：来源：
(2013·湖南，26)If nothing________，the oceans will turn into fish deserts.| A．does | B．had been done | | C．will do | D．is done |
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答案
| D |
解析
考查时态和语态。首先nothing与do之间为被动关系，排除A、C两项；根据主句的一般将来时态可知，if引导的条件状语从句使用一般现在时态。故选D。 |
举一反三
(2013·湖南，34)—I don"t understand why you didn"t go to the lecture yesterday afternoon.
—I"m so sorry.But I________my homework.| A．had done | B．was doing | C．would do | D．am doing |
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| (2013·江苏，21)Generally，students" inner motivation with high expectations from others________essential to their development. |
(2013·江苏，25)—Could I use your car tomorrow morning?
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(2013·山东，27)—Oh no! We"re too late.The train________.
— That"s OK.We"ll catch the next train to London.| A．was leaving | B．had left | | C．has left | D．has been leaving |
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(2013·辽宁，22)He was unhappy when he sold his guitar.After all，he________it for a very long time.| A．has had | B．had had | C．has | D．had |
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