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.
单项选择题
A．It must be the right height.B．It must have several gears.C．It must have good tires.D．It must be the right weight.
A．It must be the right height.
B．It must have several gears.
C．It must have good tires.
D．It must be the right weight.
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