单项选择题

Sometimes we can see ______ stars in the sky at night.

A．thousand of
B．thousands of
C．thousand
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单项选择题
Shanghai is one of ______ cities in the world.
A．big
B．the bigger
C．the biggest
单项选择题
At that time I thought it ______ rain.
A．is going to
B．was going to
C．will
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