单项选择题

What is e-books' negative impact on social relationships

A．They create new jobs only for writers.
B．Fewer and fewer people have access to new technology.
C．They may threaten some traditional trades.
D．They isolate people from one another.

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单项选择题

What is Jason Ohler's attitude towards e-books

A．Positive.
B．Indifferent.
C．Cautious.
D．Suspicious.

单项选择题

What is the author's purpose of writing the passage

A．Draw people's attention to the disadvantages of e-books.
B．Call on people to reject e-books.
C．Criticize schools and business that don't provide e-books.
D．Encourage people to use e-books.