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
I'll write back as soon as I______ your letter.
A．will get
B．get
C．have got
单项选择题
Listen! Someone ______in the next room.
A．cries
B．is crying
C．crying
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