单项选择题

At first they worried about the situation but things ______ quite satisfactory.

A．went on
B．carried on
C．worked out
D．tried out
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单项选择题
It sounded ______ down the rail.
A．as a train running
B．like a train to run
C．like a train running
D．as if a train running
单项选择题
I'm sorry to ______ too much of your time.
A．take off
B．have taken in
C．take on
D．have taken up
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