单项选择题

The millions of calculations involved, had they been done by hand, （）all practical value by the time.

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

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单项选择题
(31)（）

A. took
B. made
C. held
D. got
单项选择题
With the development in science and technology man can make various flowers（）before their time.

A. be bloomed
B. bloom
C. bloomed
D. blooming
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