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．His mother’s use of the washing machine.B．His father’s turning on the microwave oven.C．His long hours of watching TV.D．The switch on of two air-conditioners.
A．His mother’s use of the washing machine.
B．His father’s turning on the microwave oven.
C．His long hours of watching TV.
D．The switch on of two air-conditioners.
单项选择题
A．The Tower of London.B．The Tower Bridge in London.C．The Thames.D．The tall and old warehouses.
A．The Tower of London.
B．The Tower Bridge in London.
C．The Thames.
D．The tall and old warehouses.
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