Do you know about DNA? Here is an introduction of it.

DNA is short for deoxyribonucleic acid. It contains genetic instructions. These instructions are used in the development and functioning of all known living organisms(有机体). That's to say that your DNA decides what you are like. Perhaps this is a little bit difficult for you to understand. Here is an example to explain it more clearly. Before you were born, your DNA had already decided you would have two hands and that each hand would have five fingers. Your_hands_would_help_you_hold_things_and_do_many_other_things.

However, DNA is more than that. We get our DNA from our father and mother. That is why we look like our parents and are not like others'. Also because of different DNA, Chinese people look different from Americans. Chinese people have black hair and eyes, but many Americans have blue eyes and blond hair. Though we have discussed many things about DNA here, there is still a lot more to know about it. If you would like to know more about DNA, you should go on the Internet. Perhaps the website will help you.

(1、2题完成句子；3题简略回答问题；4题写下全文的主题句；5题将文中画线句子译成汉语。)

1.Americans look different from Chinese because ________________．

2.Your DNA decides ________________．

3.Whom do we get our DNA from?

________________________________________________________________________

4.________________________________________________________________________

5.________________________________________________________________________

Ⅴ.连词成句

1.carefully, him, the, examined, doctor

________________________________________________________________________.

2.discovery, is, important, this, an

________________________________________________________________________?

3.want, is, lighter, you, the, this

________________________________________________________________________.

4.do, she, with, what, it, does

________________________________________________________________________?

5.butterflies, how, the, are, beautiful

________________________________________________________________________!

根据短文内容及所给提示，在文中的空白处填写一个正确的单词。

This week we learnt a lot about science. We also did a lot of 36.e1. in science classes. We all like them because they are so 37. f2.. We concluded some theories in 38.3. (science) methods. We know science affects our life. The 39. 4. (develop) of technology has greatly changed our life. Radios, TV, computers, faxes and satellites make people close 40.5. each other. We can see nearly everything happening 41.6. (thousand) of miles away. And we can communicate with people in different land without 42.7. (leave) home. We do not have to go 43.8. (shop) every day. Once a week we buy our things including meat, vegetables and so on. We can put them in fridges. With the help of tiny scissors doctors can 44. e9. the child who is still in the womb(子宫) of his mother. Farmers use newer technology for agricultural activities. The needs of oil technology, such 45.10. long pipelines(管线), electric power, good roads, airports, bring people from different lands to the Gulf(海湾) countries to make a living.

现在的科技日新月异，各种发明以及高科技产品成了我们生活中不可缺少的东西，如笔记本电脑(laptop)、手机(mobile phone)、MP4、数码相机(digital camera)、数码摄像机(DV)等。请以“My Favourite Invention”为题描述你最喜欢的一种发明并说明理由(至少两个方面)。80—100词。

—What do you think of Lucy?

—She is ________ honest girl.

A. a B. an C. / D. the

It's unnecessary ________ us ________ the work within two days.

A. for; finish B. of; finish

C. for; to finish D. of; to finish

Study hard, or you'll fail the exam.

A. drop B. miss

C. not pass D. get good results in

I wanted to see the elephant, so my father offered ________ me to the zoo.

A. took B. takes

C. to take D. taking

Mother often warns me ________home late at night.

A. not to go back B. not going back

C. don't go back D. not go back

The fridge doesn't work. Why not consider ________ a new one?

A. buy B. bought C. to buy D. buying