— Waiter, I'd like a hot wing hamburger and corn salad.
— Sorry, sir. They ________ only for lunch and dinner. Why not consider ________ something else?
A:serve; to order
B:served; ordering
C:are served; ordering
D:served; to order
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正常人的心脏的四个腔中,流动着动脉血的两个腔是( )
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