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单项选择题


Questions 17 to 20 are based on the following monologue about energy conservation. You now have 20 .seconds to read Questions 17 to 20.
What is the main topic of this lecture

A．Bicycles and cars.
B．Building codes.
C．Energy conservation.
D．New housing construction.
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What would happen if you misuse your eyesA．You may feel...

单项选择题What would happen if you misuse your eyes

A．You may feel uncomfortable in various ways.
B．You may have to wear glasses.
C．You can let your eyes rest for a while.
D．You can go and see a doctor.,

What are the speakers trying to doA．Visit the new resta...

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判断题Florence Nightingale was from a noble family.

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