单项选择题

What's the purpose for adults to continue their education

A．Enlarge their knowledge and learn new skills.
B．Catch up the opportunity to get a higher degree.
C．Learn more basic knowledge to get a diploma.
D．Make themselves live a more comfortable life.

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单项选择题

Which of the following is TRUE according to the passage

A．Only recently did people realize the harmful effect of noise.
B．Noise pollution is the worst kind of pollution we suffer from.
C．People are now trying to find ways to make noise as low as possible.
D．The writer thinks that it is almost impossible for people to avoid noise.

单项选择题

Why are scientists surprised by the findings in their noise study

A．Because the world is becoming more and more noisy.
B．Because they have learned that noise is also a kind of pollution.
C．Because noise is an unwanted waste for human beings.
D．Because people knew little about noise before.