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It is well known that if you’re going to eat chocolate, dark chocolate is the best choice. There’s lots of evidence that dark chocolate is good for you, but until pretty recently, scientists didn’t know exactly why.

Now there may be an answer. Dark chocolate is healthy because it feeds specific bacteria that help keep the heart healthy.

More research is needed to confirm the findings, but the scientists think that eating dark chocolate, especially in combination(结合) with foods such as raw garlic and cooked whole wheat, can greatly improve human health. And combining dark chocolate with other foods high in antioxidants(抗氧化剂) could prove even more healthy. Dark chocolate still has plenty of fat, sugar and calories, so its health properties do not mean you should overindulge.

But if you love chocolate and also love being healthy, dark chocolate is the way to go. And now scientists know why.

1.How can dark chocolate do good to the heart?

A It feeds specific bacteria.

B It gives more power.

C It helps to kill bacteria.

D It helps it to fight disease.

解析：选A。细节理解题。根据第二段第二句Dark chocolate is healthy because it feeds specific bacteria that help keep the heart healthy.可知黑巧克力是通过促使产生一种特别的细菌来有益于心脏的，故选A。

2.What does the underlined word “overindulge” mean?

A Never eat it.

B Eat too much.

C Take it as medicine.

D Take it as main food.

解析：选B。词义猜测题。根据前面内容可知黑巧克力富含脂肪，因此是不应该多吃，故选B。

3.What can we learn from the third paragraph?

A How dark chocolate is good for our health is completely clear.

B Dark chocolate combines with other foods may be unhealthy.

C You can take chocolate as main food if you want to stay healthy.

D Dark chocolate is good for our health but we cannot eat it too much.

解析：选D。推理判断题。根据第三段最后两句可知黑巧克力虽然对身体好，但是也不能多吃，故选D。

4.In which column of a newspaper can you find this passage?

A Music.

B Film.

C Food.

D Education.

解析：选C。推理判断题。根据全文内容巧克力对于人身体的好处可知这应该属于食物专栏，故选C。