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.

补全对话

A:Hello,Mrs.White!

B:Hello,Mrs.Wu!

A:Are you going to do some shopping?

B:Yes.What about you?

A:　1　It’s said(据说) the things in the new market are nice and cheap.I want to go to there. 2  

B:That’s good.　3　I’m busy now.A few Chinese friends will come to see me in an hour.I’m afraid  I can’t be back before they come.

A:It doesn’t matter.We can go when we are free.

B:By the way,　4　 I haven’t been there yet.

A:It’s on the other side of the river.It’s a little far from here.

B:How long will it take me to get there by bike?

A:Half an hour.　5　It will take you right there.

B:Thanks a lot.See you!

A:See you!

Is this the watch you wish to __????? ___?

A. have it repaired 　 B. repair it 　 C. have repaired it 　 D. have repaired

Dogs are people's friends. They will do anything their masters(主人)ask them to do and they do their duty very well.

　　 Curly is my black dog. He is big and strong. He is strong enough to carry me on his 　　 56　 . He likes running and playing with me. He likes to 　　57　 .my father around in the fields, too.

　　 One day my father took off his coat. put it on the ground　 58　 a big tree and said to Curly. “　 59　 my coat.”

　　 Curly sat down on the coat. Then my father remembered he had to　 60　 dinner for the

Family.　 61　 he went home and forgot all about his coat and dog

　　 Late in the evening I　 62　 my dog and looked for him everywhere in the yard. I called, "Curly, Curly!" But Curly did not answer.

　　 Soon my father wanted something in his coat pocket(口袋). Suddenly he remembered 　　63　 he had done. Quickly he went back to the big tree. What do you think he saw? Curly was 　 64　 sitting on the coat! He was afraid someone would take it 　　65 .

56. A. hand　　　　　 B. back　　　　　　　 C. foot　　　　　　　 D. leg

57. A. follow　　　　 B. put　　　　　　　　 C. go　　　　　　　　 D. run

58. A. for　　　 　　 B. under　　　　　　　 C. to　　　　　　　　 D. from

59. A. Look　　　　　 B. Listen　　　　　　 C. Watch　　　　　　　 D. Hear

60. A. fix　　　　　　 B. discover　　　　　 C. cook　　　　　　　 D. tell

61. A. Because　　　 B. So　　　　　　　 　C. Though　　　　　　 D. Or

62. A. hoped　　　　 B. rode　　　　　　　 C. missed　　　　　　 D. saw

63. A. that　　　　 B. what　　　　　　　 C. if　　　　　　　　 D. who

64. A. always　　　 B. often　　　　　　　 C. still　　　　　　　 D. usually

65. A. away　　　　　 B. in　　　　　　　　 C. down　　　　　　　 D. for