单项选择题


A．used not
B．not used
C．used
D．is used
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单项选择题
The writer believes that reading by the computer is advisable chiefly because ______.
A．it saves a lot of time to find information needed
B．it reads more efficiently than a human mind
C．it covers a much wider range of reference
D．it guarantees reading efficiency and validity
单项选择题
In the expression an immense body of literature , the word literature is nearest in meaning to ______.
A．specific information for a research
B．printed material in general
C．words that are designated
D．fiction written by famous writers
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