Feed your brain.

　　A hungry brain is an ineffective one. Those Snickers commercials were not kidding. Your brain needs the proper nutrients to keep it going. Because of this, what you eat and drink also plays a huge role in how sharp your brain is. 4.________ Junk foods increase tiredness and lead to the infamous food coma.

　　Take breaks.

　　Your brain is like a muscle.

　　5.________

　　It can also tire if you overwork it. If you divide studying into 15－30­minute blocks with quick breaks in between, your brain will feel refreshed, grateful and ready for the next challenge you throw at it.

　　A.Learn from them for the next test.

　　B.It needs exercise to make it stronger.

　　C.It's necessary to have a long holiday and have nice food.

　　D.Group studying helps you to engage and process the information more deeply.

　　E.You can build your knowledge structure in the form of pictures.

　　F.Healthy foods provide nutrients to your brain cells to keep them energized.

　　G.We need to have a positive mental state if we want to improve our study efficiency.

　　Ⅲ.语法填空

　　(2016·宁夏回族自治区银川一中模拟)Scientists have discovered that

　　1.________ (stay) in the cold could help us lose weight. Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat — the type of fat that produces heat and keeps us warm. Brown fat burns energy, 2.________

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