单项选择题

He is badly ill. We must ______ a doctor at once.

A．send to
B．send for
C．send away
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单项选择题
We don't understand the passage ______ there are a few new words in it.
A．and
B．unless
C．because
单项选择题
He is ______ kind an old man that all the children like him.
A．very
B．so
C．such
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