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(有機體). 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題完成句子；3題簡略回答問題；4題寫下全文的主題句；5題將文中畫線句子譯成漢語。)

1.Americans look different from Chinese because ________________．

2.Your DNA decides ________________．

3.Whom do we get our DNA from?

________________________________________________________________________

4.________________________________________________________________________

5.________________________________________________________________________

Ⅴ.連詞成句

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

________________________________________________________________________!

根據(jù)短文內(nèi)容及所給提示，在文中的空白處填寫一個正確的單詞。

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(子宮) of his mother. Farmers use newer technology for agricultural activities. The needs of oil technology, such 45.10. long pipelines(管線), electric power, good roads, airports, bring people from different lands to the Gulf(海灣) countries to make a living.

現(xiàn)在的科技日新月異，各種發(fā)明以及高科技產(chǎn)品成了我們生活中不可缺少的東西，如筆記本電腦(laptop)、手機(mobile phone)、MP4、數(shù)碼相機(digital camera)、數(shù)碼攝像機(DV)等。請以“My Favourite Invention”為題描述你最喜歡的一種發(fā)明并說明理由(至少兩個方面)。80—100詞。

—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