单项选择题

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

A．He was afraid he might be kept too late.
B．He would have something more important to do.
C．He was not in the mood to attend the excursion.
D．He had to make an appointment with a friend.
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单项选择题
The study concluded that ______.
A．the conclusion had been proved
B．family size affects the development of stomach cancer strongly
C．family size is of no importance to stomach cancer
D．stomach cancer can be transmitted to others
单项选择题
Which of the following statements can best generalize the passage
A．Family size may determine stomach-cancer risk.
B．Family size may move stomach-cancer risk.
C．The study may follow more than 7,000 Japanese-American men for 28 years.
D．People from small families have an increased risk of stomach cancer.
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