A．are all overweight or obese

　　B．are likely to gain weight again after reaching their ideal weight

　　C．all fail because they are not persistent enough

　　D．all end up heavier than when they start to diet

　　26．The underlined word “triggers” in Paragraph 4 probably means ________.

　　A．effectsB．examples

　　C．causes

　　D．imagination

　　27．Which of the following is NOT the reason that many people quit dieting very soon?

　　A．The pressure they put on themselves to lose weight quickly.

　　B．Colleagues who give them fatty lunches and snacks.

　　C．Reflections they see in the mirror.

　　D．Leftovers of children’s taken by their mothers.

　　28．In which column of the newspaper do you probably find the passage?

　　A．Health.

　　B．Economy.

　　C．Sports.

　　D．Education.

　　Ⅳ.阅读填空

　　阅读短文，根据所读内容在表中的空格处填上适当的单词或短语。注意：每空不超过3个单词。

　　Air pollution refers to the introduction of some harmful gases and particulate matter(颗粒物质) in the Earth’s atmosphere which in turn results in pollution of air that the various forms of life require for various life processes. There exist natural causes of air pollution such as volcanic eruptions, wildfires, etc. as well as human causes such as vehicle emissions, industrial smoke, etc. Over the last few decades, the air pollution caused by humans has become a lot more serious and common than natural air pollution.

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