Alexis Rocha is a 13-year-old boy from California, US. He weighs 147 pounds (67 kg). But six months ago, he weighed more than 202 pounds (91 kg). How did he lose all that weight in only half a year?
“One day, I was surprised to find that I weighed about 200 pounds,” Rocha says. “I thought I had to do something.”
Rocha is from a boxing (拳击) family—his father and two older brothers are professional boxers. So he decided to start boxing. He began with simple exercises, like sit-ups and push-ups (俯卧撑). Then Rocha started jogging(慢跑). “No kid likes running,” he says. “I don’t want to do it, either, but I have no choice but to keep on.”
Months later, Rocha joined a boxing club in his city. He is always the first kid at the club to begin exercising, and the last to leave with sweat (汗水) on his face. Every day he boxes for about three hours.
“Rocha works very hard,” says his coach, Hector Lopez. “It’s surprising to see him lose the pounds so quickly. I’ve never seen anything like this in my 20 years of coaching.”
Rocha is very happy with his weight now. There is a family photo in his room from 18 months ago. “Each time I look at the photo, I laugh at myself. I was so big back then,” Rocha says. “I look 100 times thinner and 1,000 times stronger now.”
【小题1】How much weight did Rocha lose in six months?
A. At least 24 pounds.     B. At least 30 pounds.　　    C. At least 55 pounds.
【小题2】 Rocha said he had no choice but to keep on running because_______.
A. he liked running very much
B. he wanted to be thin and strong
C. he wanted to be a professional boxer
【小题3】What makes Coach Hector Lopez surprised?
A. Rocha lost weight so quickly.
B. Rocha was so fat 18 months ago.
C. Rocha comes from a boxing family.
【小题4】What’s the correct order of the following sentences?
a. He did some sit-ups and push-ups.
b. He lost the pounds quickly.
c. He joined a boxing club.
d. He began running.
f. He boxed for about three hours every day.
A. a-d-c-f-b     B. d-a-f-c-b     C. a-d-f-c-b 
【小题5】The writer mainly wants to tell us _______.
A. Rocha is a hardworking boy
B. it is important to get exercise
C. everything is possible if you work hard

  Height is just one of the thousands of features your genes 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, but 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 you're wondering how fast you should grow. It depends. There's no perfect or right answer. Generally speaking, kids grow about 2 inches (6 centimeters) a year between age 3 and the time when they start puberty (when your body starts changing and becoming more grown up).

Your doctor will know how your growth has been going over the years. Two centimeters here and 2 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 changes your body may be going through.

Don't be scared 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 7 and 13 for girls and 9 and 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 Chinese for the word “puberty” is 　　　　　　　　　.

   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 fast and how tall you should grow, _____.

   A. you should have enough exercise   B. you can ask doctors for help

   C. you should save the environment   D. You can record your growth during puberty

3. This passage is mainly about 　　　　　　　　　.

   A. how the genes work in your body           B. when is the time you grow fast

   C. why you look like your parents                D. how you grow to a certain height 

4. After reading this passage, we can explain 　　　　　　　　　.

   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 healthy diet is

5. Which is NOT mentioned in the passage?

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

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

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

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