A
Chocolate is good for your heart，skin and brain．Usually，people think that chocolate is bad for their health．They describe chocolate as“something to die for”or say“death by chocolate”．Now they should bite_their_tongues! Evidence is showing that some kinds of chocolate are actually good for you in the following ways：
A happier heart
Scientists at Harvard University recently examined 136 studies on cocoa—the main ingredient in chocolate and found that it does seem to strengthen the heart．Studies have shown heart benefits from increased blood flow．These benefits are the result of cocoa’s chemicals，which seem to prevent both cell damage and inflammation(炎症)．
Better blood pressure
If yours is high，chocolate may help．Jeffrey Blumberg from Tufts University recently found that people with high blood pressure who ate 3．5 ounces of dark chocolate per day for two weeks saw their blood pressure drop quickly．
Muscle magic
Chocolate milk may help you recover after a hard workout(锻炼)．In a small study at Indiana University，people_who_drank_chocolate_milk_between_workouts_did_better_on_a_tiredness_test_than_those_who_had_some_sports_drinks．
Better for your skin
German researchers gave 24 women a halfcup of special cocoa every day．After three months，the women’s skin was moister(更滑润的) and smoother．The research shows that chocolate helps protect and increase blood flow to the skin，improving its appearance．
Brain gains
It sounds almost too good to be true，but research suggests that chocolate may improve your memory，attention span，reaction time，and problemsolving by increasing blood flow to the brain．
【解题导语】 本文主要介绍了食用巧克力的几个益处。过去人们认为巧克力不利于健康，这种观点是错误的。经科学研究表明，巧克力是一种健康食物，对人们的健康有益。
21．What’s the meaning of “bite their tongues” in the first paragraph?
A．Stop talking． B．Speak up．
C．Think of it． D．Listen to it．
A 解析：词义猜测题。根据下文“Evidence is showing that some kinds of chocolate are actually good for you in the following ways”可知，巧克力对人的健康有好处，故此处指那些说巧克力对人体有害的人该闭嘴了。故选A。
22．What can’t we get from chocolate according to the text?
A．A healthy heart． B．Smooth skin．
C．A good mood． D．A beautiful figure．
D 解析：细节理解题。根据文中的黑体小标题可知，A、B、C三项内容都是巧克力对人的好处。而D项内容未提及。
23．What’s the meaning of the underlined sentence in the fourth paragraph?
A．Sports drinks are better than chocolate milk．
B．Sports drinks can make people feel tired easily．
C．Drinking milk can keep you energetic at work．
D．We should drink chocolate milk between times when we work hard．
D 解析：句意理解题。根据第四段可知巧克力牛奶有助于高强度锻炼后体力的恢复，画线句是对该理论的研究结果。故选D项。
24．What’s the best title for this passage?
A．Chocolate，a Healthy Food
B．More Chocolate，Less Health
C．Chocolate and Blood Pressure
D．Advice on Eating Chocolate
A 解析：标题归纳题。本文在第一段的最后点明主题：Evidence is showing that some kinds of chocolate are actually good for you in the following ways。故选A项。
