Question

Height is just one of the 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. 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（潜力）. 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 between 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 15 for boys.

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

1.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 medicine

D. you can record your growth during puberty

2.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

3.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

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 that for boys’.

C. The features showing the first changes of puberty between boys and girls are different.

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

Answer

1.B

2.D

3.D

4.C

【解析】

试题分析：这篇短文主要讲述身高是基因决定的特征之一，但是基因并不能决定一切。饮食和睡眠也会影响身高。此外，生长发育期对人的生长也有影响。

1.B细节理解题。根据文章内容“Your doctor will know how your growth has been going over the years.”的描述可知，如果想知道自己会长多高，可以问医生。故应选B。

2.D词义猜测题。根据上文 “kids grow about 6 cm a year between age 3 and the time when they start puberty”和下文“The age for starting puberty is about 10 for girls and about 11 for boys”的描述可知，这里指的是生长发育期，故应选D。

3.D主旨大意题。根据短文描述可知，文章主要介绍的是人是怎样长高的，结合选项可知应选D。

4.根据短文的描述可知，选项A、B、D的叙述符合原文内容，选项C说“特征是表明男女生长发育期的第一次改变是不同的”的说法是不符合原文内容的。故应选C。

考点：科普类短文阅读。