单项选择题

Put things back _______ you found them.

A．where
B．that
C．which
D． since
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单项选择题
The cost of self-education has fallen with the multitude of sources of knowledge and information _______ on CD-ROMs and the Internet.
A． preferable
B．ready
C．available
D． considerable
单项选择题
The company owns a large number of _______ stores.
A．export
B．bargain
C．retail
D． trade
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