单项选择题

We all enjoyed ______ on the farm.

A．works
B．working
C．work
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单项选择题
Sometimes we can see ______ stars in the sky at night.
A．thousand of
B．thousands of
C．thousand
单项选择题
Three of them have gone to the library. What about ______.
A．the other
B．the others
C．others
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