单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．How primitive people used flags.
B．What the ancient means of communication was.
C．Why the torch towers were built.
D．How the Great Wall came into being.
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填空题
Life is too short ______(不可每天将时间浪费在看电视上).
单项选择题
Which factor pushed up house prices
A．Many young men, who live alone, have increased demand for houses.
B．Many young men need to rent more houses.
C．It is easy to apply for a mortgage for young generation.
D．The number of older people, many of whom live alone, becomes bigger and bigger.
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