单项选择题

A．To set a "smoke-free" world.
B．To teach the people in developing countries a lesson.
C．To forbid farmers to grow tobacco.
D．To forbid smokers to buy tobacco products.
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单项选择题
A．It allows them to meet students from other universities.B．It promotes the concept of self-learning.C．It allows more flexibility in students’ schedules.D．It doesn’t require any examinations.
A．It allows them to meet students from other universities.
B．It promotes the concept of self-learning.
C．It allows more flexibility in students’ schedules.
D．It doesn’t require any examinations.
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