单项选择题


A．6 pills.
B．5 pills.
C．4 pills.
D．8 pills.
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单项选择题
Students who apply to the college by post will ______ .
A．avoid disappointment
B．be sent a bill
C．have an advantage over people applying in person
D．be informed if they cannot get a place
填空题
( )消费 ( )贸易壁垒
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