单项选择题


A．from
B．on
C．by
D．at
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单项选择题
A．craftB．tradeC．technologyD．profession
A．craft
B．trade
C．technology
D．profession
单项选择题
A．hasn't itB．isn't itC．doesn't itD．aren't there
A．hasn't it
B．isn't it
C．doesn't it
D．aren't there
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