This computer is of good quality. If it ___________ break down within the first

This computer is of good quality. If it ___________ break down within the first

题型:不详难度:来源:
This computer is of good quality. If it ___________ break down within the first year, we would repair it at our expense.
A.wouldB.couldC.shouldD.might

答案
C
解析

试题分析:考查条件句的虚拟语气。本题是一个与将来事实相反的虚拟语气。条件句中有三种情况,过去时;were to do ;should+动词原形,主句使用“情态动词+动词原形”;句意:这种电脑的质量很好,如果在第一年中坏掉,我们会免费为你维修。故C正确。
点评:条件句中的虚拟语气,如果过去事实相反,条件句中使用过去完成时,主句使用“情态动词+have done”;如果主句与现在事实相反,条件句中使用过去时,be动词使用were,主句中使用“情态动词+动词原形”;如果与将来事实相反,条件句中有三种:过去时;were to do ;should+动词原形,主句使用“情态动词+动词原形”;要特别注意如果省略了if,句子要使用部分倒装的形式,把助动词,be动词,情态动词提之主语前。
举一反三
If we          a full preparation, the meeting wouldn"t have been so successful.
A.haven"t madeB.wouldn"t make
C.didn"t makeD.hadn’t made

题型:不详难度:| 查看答案
He insisted that the doctor         at once.
A.be sent forB.was sent for
C.was going to be sent forD.must be sent for

题型:不详难度:| 查看答案
When it comes to giving his kids the education they deserve, the 51-year-old father knows he never _______ college without financial aid.
A.could have attendedB.could attend
C.had attendedD.should have attended

题型:不详难度:| 查看答案
Without the ‘ greenhouse effect’, the earth ____ be about thirty-three degrees Celsius cooler than it is.
A.shouldB.wouldC.willD.must

题型:不详难度:| 查看答案
It is high time that we ____ the amount of carbon dioxide in our daily life.
A. reduce     B reduced    C will reduce   D reduces
题型:不详难度:| 查看答案
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