单项选择题

A．Driving to California is cheaper.
B．He prefers taking the train.
C．The woman should take care of the money.
D．The expense for their trip is too much.
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单项选择题
Joshua Levitsky thought that ______.
A．it is costly to print paper books
B．the price of e-books and paper books shouldn’t be the same
C．it costs them nothing to print the e-books
D．people should pay what it’s worth when buying e-books
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