阅读选择阅读下面的短文,从每题所给的A、B、C三个选项中 选出最佳答案。

      Height is just one of the thousands of features your genes decide. In fact,because you have two parents,your genes provide you with a height that usually lands somewhere between the height of each parent. If both your parents are tall,then maybe 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 enough sleep and enough exercise will help you grow to the right height.

      No doubt you’re wondering how fast you should grow. It depends. There's no perfect or right answer. Kids grow about 2 inches (5 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 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 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 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 kso after your body start to show the first changes of puberty.

() 21. The passage is mainly about .

   A. how the genes work in your body

   B. when you grow fast

   C. how you can grow to a certain height

() 22. The Chinese for the underlined word“puberty” is .

   A. 婴幼儿期   B. 青春期

   C. 童年期

() 23. Which statement is NOT true?

   A. Genes can't decide everything.

   B. Healthy living habits can help you grow to the right height.

   C. Most of the boys start puberty earlier than girls.

() 24. After reading this passage,we know

   A. kids will grow faster during the puberty

   B. why unhealthy diet can keep you from growing

   C. if both your parents are tall,you will be tall,too

() 25. What is not the reason why you are shorter than your classmates now?

   A. My parents are shorter than theirs.

   B. I haven’t got my growth spurt yet.

   C. I get enough sleep and enough exercise every day.

[2015 • 长沙]阅读选择阅读下面的短文,从每题所给的A、B、C三个选项中 选出最佳答案。

      Have you ever heard of e-waste (electric waste,电子垃圾) ,which can be produced every day? How do you deal with your computers,MP4 players and mobile phones when they’re broken or you want a new one?

      Most people just throw them away. With the development of electric industry,e-waste pollution has become a serious problem. According to the United Nations? in 2014,people around the world produced 41. 8 million tons of e-waste and only recycled 6. 5  million tons. The US was the biggest waster,producing 7. 1 million tons. China came second,with 6 million tons.

      It's important to pay attention to e-waste. It can either be valuable or harmful (有害的) , depending on how we deal with it. E-waste is a valuable urban mine (城市矿藏) . The value of the metals,like gold and silver in the waste around the world,is amazing. And the metals can be reused. But if people throw them away,the toxic chemicals (有毒化学物质) can get into the earth or air,affecting the environment and people's health.

      Apple,for example,now recycle people's used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce (减少) e-waste,we can also take computers and phones to see if companies offer recycling programs.

() 21. The following can become e-waste EXCEPT .

   A. computers   B. mobile phones

   C. plastic bags

() 22. Which country produced most e-waste last year according to the United Nations?

   A. America. B. China.

   C. Japan.

() 23. What does the underlined word “affecting”

mean in this passage?

   A. 保护   B. 影响

   C. 改善

() 24. From Paragraph 4 ,we learn that .

   A. the recycle Apple products will be sold at higher prices

    B. buying longer lasting electronic products is a good way to reduce e-waste

   C. it's better to keep the unwanted electronics in your bedroom

() 25. The main purpose of this passage is to

   A. prove that e-waste is useless

   B. encourage people to buy more electronic products

   C. advise people to deal with e-waste properly to reduce pollution

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