单项选择题

（）into oceans and rivers is a serious form of pollution.

A．Pouring sewage
B．Emptying litter
C．Throwing garbage
D．Dumping sewage

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单项选择题
She did not （）staying at home as she had some sewing to do.

A．matter
B．care
C．object
D．mind
单项选择题
When it started to snow, we turned round and （）the hotel.

A．got by
B．searched for
C．made for
D．cleared up
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