About 600,000 people die of heart disease in the United States every year. That's 1 in every 4 deaths. While most people think they don't need to worry about heart disease until later on in life, the truth is, it's never too early to start taking your heart health seriously. No matter your age, making smart choices now will pay off for the rest of your life. 

Choose a heart-healthy diet. Eating certain foods can increase or decrease your chance of heart disease. Knowing which foods to pick and which to limit is a great place to start. You’d better  end your unhealthy eating habit and it may low the risk of heart disease.

Aim for 30 minutes of physical activity five times a week. One way to help manage stress is by exercising, and this will help prevent heart disease, too. While exercise five times a week may seem daunting, it's important to remember that physical activity includes anything that causes your body to burn calories. From simply climbing the stairs, to running, swimming or biking, any activity is better than no activity at all.

Know your family history. Did anyone in your family ever suffer from a heart attack? When it comes to understanding your own risk, knowing your family's history can help you avoid heart problems in the future. Ask your grandparents, parents and siblings if they've suffered from heart disease in the past, and if so, find out when. 

It's never too early — or too late — to work toward a healthier heart and lifestyle. Your heart will love the result. 

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1.How many tips does the passage write about?

A 1

B 2

C 3

D 4

解析：选C。C 细节理解题。根据文章有三句黑体可知，答案为C。

2.You’d better exercise for_______ five times a week.

A 15 minutes

B 30 minutes

C 45 minutes

D one hour

解析：选B。B 细节理解题。根据文章第三段第一句“ Aim for 30 minutes of physical activity five times a week ”可知。

3.What does the underlined word decrease mean in Chinese?

A 提升

B 减少

C 释放

D 缓解

解析：选B。B 词义猜测题。根据文章第二段第二句“Eating certain foods can increase 与your chance of heart disease. ”可知。

4.Knowing your________can help you avoid heart disease in the future.

A family history

B family age

C family tree

D family address

解析：选A。A 细节理解题。根据文章第四段第三句“When it comes to understanding your own risk, knowing your family's history can help you avoid heart problems in the future. ”可知。

5.What’s the best title of the passage?

A What is the heart disease?

B Exercise help you prevent the heart disease.

C Love your heart, love your life.

D Some tips for preventing the heart disease.

解析：选D。D 主旨大意题。整篇文章全在讲如何预防心脏病，主要讲了三点预防措施，所以选D。