单项选择题

As described in the article, speech came ______.

A．before the discovery of fire
B．after the break-up of the Roman Empire
C．when the animal called itseff man
D．at the end of sociability
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单项选择题
What makes human beings different from the rest of the animal world is their ability to ______.
A．learn a number of words
B．be taught a few grammatical structures
C．invent whole languages
D．to express their thoughts and feelings
单项选择题
Of the three languages below, grammatically the simplest one is ______.
A．Anglo-Saxon English
B．Latin
C．Modern English
D．Indo-European
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