单项选择题

The discussion was so prolonged exhausting that ______ we had to stop for refreshments.

A．at large
B．at ease
C．at random
D．at intervals
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单项选择题
There are a few small things that I don't like about my job, but ______ it's very enjoyable.
A．all at once
B．once and for all
C．so much as
D．by and large
单项选择题
Childhood can be a time of great insecurity and loneliness, during which the need to be accepted by peers ______ great significance.
A．takes on
B．works out
C．brings about
D．gives in
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