World Water Day is on 22 March each year． It started in 1992． Its goal is to get people and Governments【1】 one of our most precious resources． For human beings， water not only is an important resource to survive and grow， but also offers fun and pleasure． Could you imagine what the world would be like【2】 water？

Nowadays， we are facing an【3】number of environmental crisis（危機(jī)）such as water pollution and water shortage． In India's capital， New Delhi， millions do not have any running water．

Even in richer neighborhoods， young and old wait hours for clean water． One young woman in Ghana， like many in Africa， Asia， Latin America， and elsewhere walks kilometers for water．"I have to collect for my family five times a day．"

Something must be done to save and protect water【4】． The special day is a day for us to know about what we have done and what we should do． I believe the environment will become better and better if we follow the spirit of the World Water Day．

A. All B. Both C. Also D. Either

A. questions B. problems C. doubt D. mistakes

A. went B. going C. go D. to go

A．watch

B．watches

C．was watching

D．is watching

A. secrets B. suggestions

C. manners D. customs

A. put up B. put out

C. put off D. put away

On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole “map” of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named “genes” in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.

In 1961, Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell (細(xì)胞) to build its parts. Scientists have now found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word” means, we can help save more people from several illnesses.

Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasn’t limited in use.

根據(jù)短文內(nèi)容，選擇最佳答案。

【1】What did the two scientists first discover in 1961?

A. The “map” of DNA.B. A new illness.

C. The language of DNA.D. A message of DNA.

【2】What can we do if we understand some “words” of the language inside the body?

A. Make people get new jobs.B. Make medicine for illnesses.

C. Make maps of human.D. Make people less attractive.

【3】What do people think about this work?

A. It can cause good or bad results.B. It can cause only good results.

C. It can cause good results but won’t work.D. It can cause only bad results.

【1】The volunteers can ________ in the community.

A. clean up the houses B. build a house for the homeless

C. build a house for the homeless D. help the people who are poor

【2】Biosphere Expedition may be held ________.

A. for three months B. in the summer holiday

C. only by local scientists D. between America and China

【3】If Wu Dong is ________ years old, he can be a volunteer to help the little kids.

A. 11 B. 13 C. 15 D. 17

【4】Which of the following is TRUE?

A. The volunteer should create green areas for all the families.

B. To join the holiday volunteer work, special skills are required.

C. The volunteer can choose any service activity in the community.

D. Everyone can be a volunteer to help the little kids.

【5】What is the best title for this passage?

A. A Job Interview B. Volunteers Wanted C. Education Service D. An Expedition Club

Stephen Hawking, the best-known scientist if his time, passed away on【1】(三月)14，2018.

Hawking was born in Britain in 1942. In 1959, he entered Oxford University and then went to Cambridge University for 【2】(深遠(yuǎn)的) study. At the age of 21, he suffered from a terrible 【3】(疾病)called AlS. He had to sit in a wheelchair.

【4】 (盡管) Hawking was really sick, he never gave up studying the universe. He used every new day that life 【5】(提供) to continue his study. He said, “ Where there is life, there is hope.”

Hawking’s health condition continued to get 【6】(更糟). He lost his voice in 1985, and had to communicate through a computer. But he 【7】(設(shè)法做成) to make series of important discoveries in 【8】(物理). He also wrote some best selling science books 【9】(成功地), such as A Brief History of Time and The Universe in a Nutshell.

Hawking was a great scientist，his work and story will live on for many years. His spirit will 【10】(仍然) encourage people across the world. We will remember him forever.