The calculations.had they been done by hand. all practical value by the time they were finished．( )A．had lostB．would loseC．should have lostD．would have lost 题目和参考答案——青夏教育精英家教网—

题目内容

19．The calculations，had they been done by hand，_____all practical value by the time they were finished．（　　）

	A．	had lost		B．	would lose
	C．	should have lost		D．	would have lost

分析珠算，如果不是手工运算，那么计算完成后将会失去了所有的实用价值．

解答答案：D
题干中had they been done by hand使用了倒装结构，是一个省略了if的条件状语从句；条件状语从句中是过去完成时态，可以知道是一个对过去的虚拟；对过去的虚拟，主句中要用情态动词加完成时态；should应该，would将会．故选D．

点评虚拟语气是表示与事实相反的假设，构成方式有：对现在或将来，条件句中用一般过去时态，主语用情态动词加动词原形；对过去，条件句中用过去完成时态，主语用情态动词加完成时态．学习时，要牢记构成方式．

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	C．	played		D．	would have played

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增加：在缺词处加一个漏字符号（/\），并在其下面写出该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写出修改后的词．
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2．只允许修改10处，多者（从第十一处起）不计分．
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