单项选择题

There are a lot of small living things in the sea,and they live by eating fishes.

A． Right.
B． Wrong.
C． Doesn't say.
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单项选择题
The temperature of the top of the sea is higher than the temperature of the deep sea.
A． Right.
B． Wrong.
C． Doesn't say.
单项选择题
Hurry up ! The play ______ for ten minutes.
A． has begun
B． had begun
C． has been on
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