单项选择题

Questions 16 to 18 are based on the passage you have just heard.

A. To keep selling them to people by producing cigarettes with less tar.
B. To persuade people to give up smoking entirely.
C. To reduce the risk to people’s health.
D. To let people know the risk to people’s health.
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单项选择题
A. They defend the bone against viruses.B. They prevent oxygen from entering the bone.C. They break down bone tissue.D. They connect the bone to muscle tissue.
A. They defend the bone against viruses.
B. They prevent oxygen from entering the bone.
C. They break down bone tissue.
D. They connect the bone to muscle tissue.
单项选择题
A. Because the class has been assigned to read French books.B. Because he was able to read it in French.C. Because he isn’t sure it’s available in English.D. Because he thinks it’s an example of what the professor wants.
A. Because the class has been assigned to read French books.
B. Because he was able to read it in French.
C. Because he isn’t sure it’s available in English.
D. Because he thinks it’s an example of what the professor wants.
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