单项选择题

The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.

A．bad they been done
B．they had been done
C．having been done
D．they were done
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单项选择题
You ______ him so severely; you should be tolerate to him.
A．shouldn't criticize
B．mustn't criticize
C．couldn't have been criticizing
D．shouldn't have been criticizing
单项选择题
______ everything taking into consideration, the solution offered by the Dean is relatively feasible.
A．Since
B．For
C．As
D．With
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