单项选择题


A．negative
B．common
C．normal
D．natural
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单项选择题
A．being madeB．have been makeC．madeD．are
A．being made
B．have been make
C．made
D．are
单项选择题
A．whichB．whatC．thatD．how
A．which
B．what
C．that
D．how
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