Height is just one of the thousands of features your genes (基因) decide. In fact, because you have two parents, your genes provide you a height that usually lands somewhere between the height of each parent. If both your parents are tall, then most probably you will be tall, too. If you have questions about how tall you’re going to be, ask your doctor if he or she can help you find it out.

But genes don’t decide everything. For example, eating an unhealthy diet can keep you from growing to your full potential (潜力). Getting plenty of sleep and enough exercise will help you grow to the expected height.

No doubt(怀疑) you’re wondering how fast you should grow. It depends. There’s no perfect(完美的) or right answer. Generally speaking, kids grow about two inches (six centimeters) a year between age three and the time when they start puberty.

Your doctor will know how your growth has been going over the year. Two centimeters here and two inches there are not nearly as important as the height you’re at now, how you’ve been growing up to this point, and what other changers your body may be going through.

Don’t be nervous if you seem to have grown a lot in a very short time. Everyone has a growth spurt (高峰) during puberty. The age for starting puberty is about 10 for girls and about 11 for boys. But it can be earlier or later, between 7and 13 for girls and 9and 15 for boys.

You’ll usually begin to notice that you’re growing faster about a year or so after your body starts to show the first changes of puberty.

1.The underline word “puberty” means________ in Chinese.

A. 童年时期B. 婴幼儿时期

C. 习惯养成期D. 生长发育期

2.If you want to know how tall you shall grow, _______.

A. you should have enough exercise

B. you can ask your doctor for help

C. you should have a healthy diet

D. you can record your growth during puberty

3.After reading this passage, we can learn _______.

A. how good it is to be a doctor

B. how much sleep time we need

C. why genes can’t decide everything

D. what is healthy diet for children

4.Which is NOT mentioned in the passage?

A. Your height most probably depends on how tall your parents are.

B. Girls’age for starting puberty is usually earlier than boys’.

C. The time showing the first changes of puberty is never noticed.

D. You may be nervous sometimes when you grow too fast.

5.This passage is mainly about _______.

A. how the genes work in your body

B. the time at which you grow the most

C. how you grow during your puberty

D. how you grow to a certain height

(Four students are talking about the future after class.)

Deng Yu:

In 2050, China will be richer than it is now. Beijing will be getting ready for the 40th Olympic Games in 2052. We will see the blue and clear sky and smell the fresh air. There will be more pandas living happily in China. I believe that 2050 will be the year of China.

Liu Yuan:

A holiday trip to the moon will no longer(不再) be a dream. We can also travel far to other planets and talk with the spacemen. We might also eat something like pills instead of meals. Everyone will enjoy a longer life.

Sun Wei:

Robots will be very popular. They will do what people don’t want to do. We’ll build new homes on other planets. By then, I’ll be sixty years old. Maybe we will have an exciting talk in my new home on another planet!



Zhang Lan:

By the year of 2050, cloning(克隆) will be used in many ways. It will bring back animals which disappeared(消失) many years ago. There will be no pollution(污染). The whole world will be one big family. There will be no wars. As time passes, we’ll live a much easier and better life.

1.It is the _______ Olympic Games in 2048.

A. 38th B. 39th C. 40th D. 41st

2.According to Liu Yuan, everyone will live a(n) _______ life.

A. boring B. exciting C. longer D. interesting

3._______ thinks that people can spend their holidays on the moon in the future.

A. Deng Yu B. Zhang Lan C. Sun Wei D. Liu Yuan

4.What does Zhang Lan think will happen in the future?

A. People will live in a world without wars.

B. Robots will do the things that people don’t want to do.

C. People can talk with the spacemen.

D. There will be more pandas living happily in China.

5.From the talk, we can know that _______.

A. people are still polluting the earth today

B. the 50th Olympic Games will take place in 2052

C. we will have the same food in 2050 as we do now

D. all the people will move to another planet in the future

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