单项选择题

A．Look around for the old exams.
B．Not to bother studying Jacob’s old exams.
C．Look at the old exam but do not depend on it.
D．Look at the old exam and spend a lot of time studying it.
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单项选择题
A．Environmental concerns rise.B．Advertisers are self-regulating themselves.C．Advertisements become very regulated.D．The mainstream also becomes concerned about environment.
A．Environmental concerns rise.
B．Advertisers are self-regulating themselves.
C．Advertisements become very regulated.
D．The mainstream also becomes concerned about environment.
填空题
The author mentioned software and copyrights in the second paragraph to demonstrate ________.
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