问题
单项选择题
The millions of calculations, had they been done by hand,______all practical value by the time they were finisheD．
A．could lose
B．would have lost
C．might lose
D．ought to have lost
答案
参考答案：B
解析： 26．此句为假设条件被隐蔽的虚拟句，可还原为If they had been done by hand, the millions of calculations would have lost all practical value by the time they were finisheD．