44. 如果你缺了很多課，就很難趕上。

If you miss a lot of classes,it's very difficult to              

43. 對(duì)我們來(lái)說(shuō)，拒絕毒品很重要。

It's important for us to                    drugs.

42. 他偶爾去拜訪他們。

He goes to visit them                 

41. 電視機(jī)出了故障，它需要修理。

There's                with the TV. It       repairing.

40. It is       (think) that people will live a happier life in the future.

39. I'm afraid I have       (put) on weight.

38. We expect       ( see) the famous writer again.

37. Cancer is the second       (big) cause of death.

36. It is necessary for us       (take) exercise every day.

 Height is just one of the features your genes       (基因) decide. In fact,because you have two par?ents,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 them out.

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

It's natural that you're wondering how fast you should grow. There's no perfect or right answer. Generally speaking,kids grow about 6 cm a year be?tween age 3 and the time when they start puberty.

Your doctor will know how your growth has been going over the years. 2 cm here and 3 cm there make a little difference to the height you're at now. How have you been growing up to this height? What other changes may your body be going through?

Don't be amazed 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 15for boys.

You'll usually begin to notice that you're grow?ing faster about a year after your body starts to show the first changes of puberty.

(   ) 31. If you want to know how tall you should grow, .

   A. you should have enough exercise

   B. you can ask doctors for help

   C. you should take some special medi?cine

   D. you can record your growth during puberty

(   ) 32. The Chinese for the word "puberty " is

   A. 童年時(shí)期   B. 嬰幼兒時(shí)期C習(xí)慣養(yǎng)成期   D. 生長(zhǎng)發(fā)育期

(   ) 33. This passage is mainly about .

   A. how the genes work in your body

   B. how your parents' height influence you

   C. how you look like your parents

   D. how you grow to a certain height

(   ) 34. After reading this passage,we can ex?plain .

   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

(   ) 35. 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 usu?ally earlier than that for boys".

   C. The features showing the first chan?ges of puberty between boys and girls are different.

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