“The answer sheet written with a pencil be cancelled,” declared the teacher.
A. shall B. should C. must D. may
Li yanhong, co-founder of search engine Baidn, has deep understanding of Internet technology.
A. /;a B. the; / C. a; a D. the; a
－I’m entering for the English speech contest.
－__________!
A．Congratulations B．Enjoy yourself
C．Wonderful D． Good luck
书面表达
假设你是李华，某高中学生，今年暑假将前往澳大利亚参加主题为"WATER FOR LIFE"的交流活动。请你以参访代表的身份，根据以下图片提示，用英语写一篇发言稿。
注意:
1.根据图片的内容适当展开，以使行文连贯;
2.开头与结尾已写好，不计入总词数;
3.词数:120左右。
Ladies and gentlemen，
Good morning. I'm Li Hua from Fujian，China. It's my great honor to be here to say something about the global water shortage and ways of dealing with it.
That’s all. Thank you.
The ocean bottom，a region nearly 2.5 times greater than the total land area of the Earth， is even today largely unexplored. Until about a century ago，the deep-ocean floor was completely inaccessible and hidden beneath waters averaging over 3，600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth's surface，the deep-ocean bottom is a strange environment to humans，in some ways as forbidding and remote as the outer space.
Although researchers have taken samples of deep-ocean rocks for over a century，the first detailed global study of the ocean bottom did not actually start until 1968，with the beginning of the National Science Foundation's Deep Sea Drilling Project ( DSDP). Using techniques first developed for the offshore oil and gas industry，the DSDP's drill ship，the Glomar Challenger，was able to maintain a steady position on the ocean's surface and drill in very deep waters，taking samples of rock from the ocean floor.
The Glomar Challenger completed 96 voyages in a 15-year-research program that ended in November 1983. During this time，it sailed 600，000 kilometers and took almost
20，000samples of rocks around the world. Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the future. Today，largely on the strength of evidence gathered during the Glomar Challenger's voyages，nearly all earth scientists agree on the theories of plate tectonics (构造学) and continental drift that explains many of the geological processes.
The samples of rocks drilled by the Glomar Challenger have also provided a climatic record stretching back hundreds of millions of years. The information of past climatic changes can be used to predict future climates.
1.The underlined word" inaccessible" in Line 3 means .
A. unrecognizable B. unreachable C. unusable D. unreasonable
2.Why does the author mention "outer space" in the first paragraph?
A.The Earth's climate millions of years ago was similar to that in outer space.
B.It is similar to the ocean floor in being strange to the humans.
C.Rock formations in outer space are similar to those found on the ocean floor.
D.Techniques used by scientists to explore outer space were similar to those used in ocean exploration.
3.Which of the following is TRUE of the Glomar Challenger?
A. It is a type of submarine. B. It is an ongoing project.
C. It has gone on over 100 voyages. D. It made its first DSDP voyage in 1968.
4.The Deep Sea Drilling Project was significant because it was .
A.an attempt to find new sources of oil and gas
B.the first extensive exploration of the ocean bottom
C.made up of geologists from all over the world
D.supported entirely by the gas and oil industry
5.Which is NOT mentioned in the passage as being a result of the Deep Sea Drilling Project?
A.Geologists were able to determine the Earth's appearance millions of years ago.
B.Two geological theories became more widely accepted by scientists.
C.Geologists observed forms of life never before seen.
D.Information was revealed about the Earth's past climatic changes.
Sandstorms hit northwestern China's Gansu Province and North China's Inner Mongolia Autonomous Region on the first day this year. According to Sun Landong， a meteorologist with the Lanzhou Meteorology Observatory，visibility was less than 100 meters in Minqin， a Gansu county near Inner Mongolia， because of sand. When visibility drops to less than 1 kilometer，it is called a sandstorm. The sandstorm in Minqin blew up dust in neighboring towns， such as Baiyin， Wuwei， Jinchang and Lanzhou， the capital city of Gansu Province. Dust-laden winds also swept into Beijing. Brought by northwesterly blowing at more than 20 meters per second，dust first reached the capital's suburbs at 7 a. m，downtown areas at 9 a. m. The winds，which died down during the night，brought the temperature down to as low as 80C below zero and many flights put off their planned time from the city's airport.
It is quite rare for sandstorms，which are frequent between March and June，to happen in winter，when the earth is frozen. The sandstorms in Gansu and Inner Mongolia do not necessarily mean there will be more of them in the spring than last year，when they were serious，but Beijing is taking it very seriously. It is reported that Beijing will spend 6 billion yuan ( US 725 million) in preventing sandstorms in the capital and has already set up a special team to make sure what causes them.
1. What is the main idea of the passage?
A. Sandstorms took place in Gansu.
B. Sandstorms happened on the first day of the new year.
C. Sandstorms are very serious，compared to last year.
D. Experts are trying their best to determine the cause of the sandstorm formed this year.
2.Suppose the dust was 300 kilometers away from Beijing， it would reach Beijing about
hours later if it travels at a speed of 20 meters per second?
A. 4. 2 B. 1. 5 C. 2. 0 D. 2. 5
3.Why did sandstorms begin in the winter this year?
A. Because there was little snow this season.
B. Because a lot of trees have been cut down.
C. Because people took few measures to control them.
D. It is not mentioned in the passage.
4. Which of the following doesn't belong to the bad effect the sandstorms have done in Beijing?
A. The temperature fell. B. Flights put off their time to take off.
C. The air is dirty. D. People had three days off.
5.The author wrote the passage to .
A. tell us the environments are becoming worse and worse
B. explain what measures people have taken to control sandstorms
C. make people realize the need to protect the environment.
D. call on us to do what we can to save the earth
