单项选择题

Now that in scientific communities the use of computers is widespread, and supposing that there is sufficient time, there exist no complicated problem ______ can be addressed with some hope of resolution.

A．and
B．but
C．as
D．which
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单项选择题
Their proposal is better than ours, ______.
A．all things considering
B．all things considered
C．all things are considered
D．all considered things
单项选择题
None of the day's transactions, ______ sales or delivery, came off well.
A．from
B．it being
C．be it
D．was it
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