单项选择题

Questions 16 to 20 are based on the following talk.

A．It is the most common sleeping problem that people are suffering from.
B．About 8 to 10 percent of adult population have this problem.
C．During sleep bruxism, a person’s teeth make contact for 40 minutes a day.
D．During sleep bruxism, the upper and lower teeth may come into contact with 250 pounds of pressure.
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单项选择题
A．His own family.B．Holiday pictures.C．Other people s children.D．Pictures of other artistic areas.
A．His own family.
B．Holiday pictures.
C．Other people"s children.
D．Pictures of other artistic areas.
单项选择题
Why does the writer suggest that you put yourself in the other side s position
A．Because they may have lied about what they want.
B．In order to avoid being trapped into making a deal you cannot change.
C．Because it is likely that they have more to offer than you do.
D．In order to be able to see your real value to them.
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