单选题：请在第_(50)___处填上正确答案。

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请在第_(50)___处填上正确答案。 A．Such persons have a weak or damaged heart, high blood pressure, or otherproblems of the blood system.
B．Several of these conditions are present at the same time.
C．Most people suffer only muscle pain as a result of heat stress.
D．Several hot days are considered a heat wave.
E．So does extreme heat.
F．Doctors say people can do many things to protect themselves from the dangers of extreme heat

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请根据短文的内容，对做出判断Taking Pictures of the World Meet Annie Griffi

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请在第(58)处填上正确答案

请在第__(58)__处填上正确答案A．going B．getting C．holding D．making

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