单项选择题

"Unfold" means ______.

A． to appear and spread
B． to fly over
C． to set to work
D． to get busy
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单项选择题
The word fruition as used in Para. 4 is closest in meaning to
A． operation
B． realization
C． suggestion
D． supposition
单项选择题
What does the passage mainly discuss
A． Similarities between computer stored information and electronic books.
B． Content kept in electronic books.
C． Different types of electronic books.
D． Development of electronic books in future.
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