单项选择题

We had difficulties at first but everything worked ______ smoothly in the end.

A．off
B．out
C．away
D．up
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单项选择题
Agriculture is the country's chief source of wealth, wheat ______ by far the biggest cereal crop.
A．is
B．been
C．be
D．being
单项选择题
She is ______ a musician than her brother.
A．much of
B．much as
C．more of
D．more as
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