单项选择题

A．They are checked out.
B．They are specially coded.
C．They are inspected by the guard.
D．They are marked with colored labels.
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单项选择题
A．Go cross the bridge.B．Repeat the experiment.C．Come to the bridge game.D．Wait and see what will happen.
A．Go cross the bridge.
B．Repeat the experiment.
C．Come to the bridge game.
D．Wait and see what will happen.
单项选择题
A．Studying for a test.B．Visiting a close fiend of theirs.C．A class presentation they’re preparing.D．A television program the man is watching.
A．Studying for a test.
B．Visiting a close fiend of theirs.
C．A class presentation they’re preparing.
D．A television program the man is watching.
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