单项选择题

A．An auto mechanic.
B．An electrician.
C．A carpenter.
D．A telephone repairman.
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问答题
The tradition of hospitality can be also attributed to the__________of frontier daily life.
单项选择题
According to Janet Anderson, the EPA________
A．has cancelled its approval for field tests of the GM organism
B．hasn’’t reviewed the findings of Ingham’’s research
C．has approved field tests using the GM organism
D．hasn’’t given permission to field test the GM organism
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