单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．It remains unknown yet.
B．Around five thousand years ago.
C．About two million years ago.
D．About three hundred thousand years ago.
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单项选择题
A．He will definitely come.B．He can’t accept such generosity.C．He is too busy.D．He will be out of town this weekend.
A．He will definitely come.
B．He can’t accept such generosity.
C．He is too busy.
D．He will be out of town this weekend.
单项选择题
What did the research findings of the Human Engineering Laboratories show
A．Leaders tend to have large vocabularies.
B．Average people can grasp 30 000 words easily.
C．Incomes and vocabularies are closely related.
D．People actually think with words.
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