单项选择题

Why should old books be saved

A．Because they give us a lot of information.
B．Because they are very interesting.
C．Because they may be the only copy.
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单项选择题
A．whatB．whyC．how
A．what
B．why
C．how
单项选择题
Once grey wolf could be found in many parts of the earth.
A．Right.
B．Wrong.
C．Doesn't say.
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