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
We can infer from the passage that the oldest form of communication between people is ______.
A．speech
B．touch and hearing
C．sounds
D．body language
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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