[解析]
(1)D.联系上文题。根据空前Then how much water do you need to drink?Many say you should drink eight 8﹣ounce glasses of water a day.Not so,some experts say.(那么你需要喝多少水?许多人说你应该每天喝8杯8盎司的水。一些专家认为并非如此。)引出本段话题:你需要喝多少水。然后提出许多人对此的看法,并被专家否定了。后面对比不同人的需水量,说明了体重及其进行的活动不同,需水量不同,所以"D.Instead,your body and the activities you attend matter.(相反,你的身体和你参加的活动很重要。)"符合语境,故选D项。
(2)F.段落大意题。根据下文Someone with a heart condition or kidney stones has one level of need.A person taking diurelie drugs(利尿药)may need a different amount of water.You may need to change the amount you are drinking if you have been ill with vomiting or diarrhea.(患有心脏病或肾结石的人有一定程度的需求。服用利尿剂的人可能需要不同量的水。如果你有呕吐或腹泻的症状,你可能需要改变饮水量。)从空后heart condition(心脏情况),kidney stones(肾结石),A person taking diuretic drugs(利尿药),vomiting or diarrhea(呕吐或腹泻)可看出,该段主要在说需水量与个人身体健康状况有关,此空为该段的主旨句,所以"F.The amount of water you need in a day also depends on your health.(你一天需要多少水也取决于你的健康。)"符合语境,故选F项。
(3)G.推理判断题。根据空后You also get water from what you eat.(你也可以从你吃的东西中获得水分),其中"also",说明前面已经提出了一个人体中水的来源,所以"G.But when it comes to hydration,any drink can add water to your system.(但是说到水合作用,任何饮料都能给你的身体补充水分。)"符合语境,且与第一句Water is a better choice than sugary sodas or fruit juices.(水是比含糖汽水或果汁更好的选择。)连贯,"any drink"与"sugary sodas or fruit juices"对应,故选G项。
(4)A.联系上文题。根据空前Your body will tell you if you are hydrated enough.(你的身体会告诉你体内的水是否充足。)You don't have to think about it or add up the ounces you drink.(你不必思考这个问题也不必增加喝水量。)你口渴的时候就是身体在给你信号,所以你在这个时候喝水就可以了,不必专门去考虑体内的水是否充足,所以"A.Just drink then you are thirsty.(渴了就喝吧。)"符合语境,故选A项。
(5)B.细节理解题。根据空后"add electrolytes to stay healthy"表明电解质有利健康,说明电解质在人体内有重要作用,B项符合,"They"对应"Electrolytes","vital"对应"essential",所以"B.They are vital to many functions in the body.(它们对人体的许多功能都至关重要。)"符合语境,故选B项。