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
The old cover of the book ______.
A． must be used
B． is sometimes used
C． should never be used
单项选择题
The Restaurant is welcomed ______.
A． only by children
B． only by old people
C． almost by everyone
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