单项选择题

The meeting was so prolonged and exhausting that _________ the speakers stopped for refreshments.

A．at large
B．at ease
C．at intervals
D．at random
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单项选择题
She listened carefully _________ she might discover exactly what he wanted.
A．so as that
B．in case
C．providing
D．in order that
单项选择题
Molten iron is poured into the mixer in the same way _________ tea is poured into a cup from a teapot.
A．as
B．that
C．since
D．like
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