单项选择题

What is the main idea of last two paragraphs

A．The difference and resemblance of using language between human beings and animals.
B．The function of language.
C．How the human beings produce the sound.
D．Humans are characterized in many ways to use symbolic communication.

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单项选择题

Which of the following can be the best title of the article

A．New mission—repairing the International Space Station
B．Second spacewalk ends after mishaps
C．New crew to inhabit the station
D．Endeavours' new flight

单项选择题

From the sentence Energy Secretary Bill Richardson, whose department had ignored security at Los Alamos for years, was walking around in a daze. , we know that_____.

A．Energy Secretary Bill Richardson was chiefly responsible for the case
B．Energy Secretary Bill Richardson was in a great angry
C．Energy Secretary Bill Richardson was losing his mind in dealing with the case
D．Energy Secretary Bill Richardson was defeated severely