单项选择题

There are a lot of small living things in the sea, and ______.

A．they live by eating fish
B．they depend on fish for their food
C．they are good food for fish
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单项选择题
One day the old shoes ______.
A．threw into the rubbish pit
B．was thrown into the rubbish pit
C．were thrown into the rubbish pit
单项选择题
Where did the dog take the old shoes back from.
A．It took them back from the street.
B．It took them back from the rubbish pit.
C．It took them back from the river side.
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