单项选择题

Some scientists believe that dolphins have a language of their own.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
Sounds can be called a language only when they have a structure and a grammar.
A． Right
B． Wrong
C． Not mentioned
单项选择题
The dolphin leapt up into the air because Sagan was too near the water.
A． Right
B． Wrong
C． Not mentioned
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