单项选择题

He __________ into the office building when the fire bell rang.

A．goes
B．has gone
C．was going
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单项选择题
Grandmother is ill. We must __________ a doctor.
A．send away
B．send off
C．send for
单项选择题
—Hello! How are you-- __________.
A．Fine. Thank you. And you
B．How are you
C．Hello.
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