单项选择题

______ Russia is next to ______ China.

A．The.../
B．/.../
C．The ... the
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You'd better ______ your bed before having your breakfast, Sam!
A．do
B．make
C．clean
单项选择题
Julia must ______ now, because the light of her room is turned off.
A．sleep
B．sleeping
C．be sleeping
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