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
If I don't see you again, I hope it all ______ well for you.
A．go
B．went
C．goes
单项选择题
They didn't go to the park last Saturday ______ it was raining hard.
A．that
B．while
C．because
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