· Give your eyes a break.Two－thirds of Americans spend up to seven hours a day using computers or other digital products.__3__

　　Experts recommend that people practice the 20/20/20 rule：every 20 minutes，take a 20－second break and look at something 20 feet away.

　　·__4__

　　As part of a healthy diet，eat more fruits and vegetables each day.Vitamins (维生素) C and E help protect eyesight and promote eye health.

　　·Practice safe wear and care of contact lenses (隐形眼镜)．Many Americans use contact lenses to improve their eyesight.While some follow the medical guidance for wearing contact lenses，many are breaking the rules and putting their eyesight at risk.__5__

　　Otherwise，you may have problems such as red eyes，pain in the eyes，or a more serious condition.

　　A．Eat your greens.

　　B．Eye care should begin early in life.

　　C．They can properly protect your eyes.

　　D．Stay in good shape by taking more vitamins.

　　E．Parents usually don't care about their own eyesight.

　　F．Always follow the doctor's advice for appropriate wear.

　　G．This frequent eye activity increases the risk for eye tiredness.

　　G

　　(2017·新课标全国Ⅱ)

　　Tips for Cooking on a Tight Schedule

　　From my experience，there are three main reasons why people don't cook more often：ability，money，and time.__1__ Money is a topic I'll save for another day.So today I want to give you some wisdom about how to make the most of the time you spend in the kitchen.Here are three tips for great cooking on a tight schedule：

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