单项选择题

What means of communication is used by most people

A．Facial expressions.
B．Body movements.
C．Speech.
D．Body movements and speech.
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单项选择题
According to the passage, what would happen to us without communication
A．We should learn everything for ourselves.
B．We would become unable to speak.
C．We couldn't live happily.
D．We might have to do everything by ourselves.
单项选择题
Which of the following statements is true
A．Humans do not have adequate knowledge about animal languages.
B．We are now very much aware of animal languages.
C．Most of animals use their facial expressions.
D．All the animals make sounds to communicate with each other.
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