It is about the health of many people, or everybody, rather than one person. Public health stops instead of encouraging a disease through surveillance(监督) of cases. To prevent being sick, it is good to do healthy behaviours, such as hand washing, vaccination programmes and so on. When infectious diseases break out, washing hands may be especially important.

　　16．What is the best title of the passage?

　　A．Physical, mental and public health

　　B．Something about health

　　C．Importance of health

　　D．Three healthy lives

　　17．What does “Body Mass Index” in Paragraph 1 consist of?

　　A．Exercise, proper diet and nutrition.

　　B．Abilities, functions and demands.

　　C．Recovery, independence and relation.

　　D．Height, weight and their relation.

　　18．What are the signs of mental health?

　　A．Living an independent life and suffering from hardships.

　　B．Reducing normal levels of stress and handling bounce back.

　　C．Increasing emotional demands and psychological well－being.that refers to ________．e problem of public health

　　C．the problem of mental health

　　D．the importance of washing hands

　　20．What can promote your body health according to the passage?

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