单项选择题

A．Red.
B．Green.
C．Blue.
D．Purple,
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单项选择题
A．Because it serves only a few specialties.B．Because it’s too crowded.C．Because it’s too costly.D．Because the service is too slow.
A．Because it serves only a few specialties.
B．Because it’s too crowded.
C．Because it’s too costly.
D．Because the service is too slow.
填空题
scarce
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