[解析]
(1)F.推理判断题。根据前句Experts say that breakfast is much more important than any other meal表示"专家说,早餐比其他任何一餐都重要得多";以及后句So don't miss breakfast ﹣ especially before an exam表示"所以不要错过早餐,尤其是考试前",可知表示"当你吃了东西,你的大脑工作得更好"的选项F符合前后的语境,故选F.
(2)G.细节理解题。根据后句They work more quickly than bread and rice,so they give you a short burst (爆发) of energy,but afterwards you feel more tired表示"它们比面包和米饭更快地起作用,所以它们给你短暂的能量爆发,但之后你会感到更累",可知表示"巧克力、饼干和糖果对你的大脑不好"的选项G符合前后的语境,They代指巧克力、饼干和糖果,故选G.
(3)D.细节理解题。根据前句Your brain needs oxygen,which it gets from exercise表示"你的大脑需要氧气,而氧气是从运动中获得的",可知表示"锻炼也能提高你的记忆力"的选项D符合前后的语境,exercise是原词复现,故选D.
(4)E.推理判断题。根据后句Not getting enough water will stop your brain from working well.And remember,water isn't as expensive as sweet drinks表示" 没有足够的水会阻碍你的大脑正常工作。记住,水不像甜饮料那么贵",可知表示"水比甜饮料好得多"的选项E符合前后的语境,故选E.
(5)B.主旨判断题。根据后句Your brain needs several hours' sleep,so it can "update" itself,just like a computer.Experts say that when you study for a test or an exam,you should get some sleep as quickly as possible after you've finished studying.This helps you to remember what you've learnt表示"你的大脑需要几个小时的睡眠,所以它可以像电脑一样更新自己。专家说,当你为考试而学习时,你应该在完成学习后尽快地睡一觉。这有助于你记住你所学的东西",可知表示"睡个好觉"的选项B符合本段的主题,sleep是关键词,故选B.