单项选择题

When products made in factories______, they are thrown away as garbage.

A．come to an end
B．are put to use
C．are used up
D．wear out
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单项选择题
Paper making began in China and from there it______to North Africa and Europe.
A．sprang
B．spilled
C．carried
D．spread
单项选择题
The car was going too fast on a wet road, ______it crashed and the driver was in hospital.
A．but
B．moreover
C．furthermore
D．so
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