单项选择题

If the earth suddenly ______ spinning, we wouldn't do anything.

A．stopped
B．stops
C．has stopped
D．is stopping
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单项选择题
He told me that nothing but toys ______ sold in this shop.
A．are
B．was
C．is
D．to be
单项选择题
Scarcely had I went home ______ he went out.
A．when
B．than
C．while
D．as
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