单项选择题

During REM, ______.

A．your eyes move quickly
B．you dream
C．you are restless
D．both A and B
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单项选择题
A good title for this passage is ______.
A．Sleep
B．Good Health
C．Dreams
D．Work and Rest
单项选择题
The picture, ______ she paid $ 5,000, was once owned by an old artist.
A．in that
B．for which
C．which
D．at which
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