单项选择题

There ______ some boys on the playground.

A．is
B．are
C．have
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单项选择题
—It's a bird.—I don't know ______ name.
A．it
B．his
C．its
单项选择题
I ______ go there this morning,so I stayed home.
A．didn't need to
B．didn't need
C．needn't
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