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．had 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
Nowadays Internet enables us to know things happen almost at the exact moment ______.
A．which they are happening
B．they are happening
C．which they happen
D．they have happened
单项选择题
The lecturer made such a boring speech. But I wasn't bothered by the dullness ______ by his carelessness.
A．more than
B．so much as
C．than
D．as
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