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X Read the passage. Answer the questions below.
Scientists have discovered that the ozone layer is getting thinner. Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years. These harmful rays can also damage the eyes, create wrinkles, and cause other health problems.
The stratosphere contains a form of oxygen called ozone. Ozone is a molecule composed of three oxygen atoms. The chemical formula of ozone is 03. Oxygen molecules make up about 21% of all gases in the Earth’s atmosphere. They consist of two atoms of oxygen and are labeled 02. Most ozone found in our atmosphere is formed by an interaction between oxygen molecules and ultraviolet radiation (UV) from the sun. When ultraviolet radiation hits an oxygen molecule, it may cause the molecule to break apart into single atoms of oxygen. These single atoms are very reactive, and a single oxygen atom can combine with a molecule of oxygen to form ozone.
1.What do people say about the rate of deaths from skin cancer in the future?
=> Some predict that the sun’s rays will cause a sharp increase in deaths from skin cancer over the next fifty years. These harmful rays can also damage the eyes, create wrinkles, and cause other health problems.
2. How many oxygen atoms are there in a molecule?
=> Oxygen molecules make up about 21% of all gases in the Earth’s atmosphere
3.What elements participate in the formation process of ozone?
=> Most ozone found in our atmosphere is formed by an interaction between oxygen molecules and ultraviolet radiation (UV) from the sun.
4.What happens when an oxygen molecule and an ultraviolet radiation hit each other?
=> When ultraviolet radiation hits an oxygen molecule, it may cause the molecule to break apart into single atoms of oxygen
5.What is the feature of single atoms?
=> These single atoms are very reactive, and a single oxygen atom can combine with a molecule of oxygen to form ozone.
II. Fill in the blank of the following passage with ONE suitable word. Write your answer on your answer sheet.
There is much more water than land (1)____on_______ the surface of the earth. The sea and oceans (2)_____are________ nearly four-fifths of the whole world, and only one-fifth of (3)___surface _______ land. If you traveled over the earth (4)____in_____different directions, you would have to spend much more of your time (5)______travelling__________ on water than on roads or railways. We sometimes forget that (6)______each_________ every mile of land there is four miles of water.
There is much water on the surface of our earth that we (7)______have________ to use two words to describe. We use the word seas to (8)____describle __________ those parts of water surface which (9)_______are _______ only a few hundreds of miles wide, the word oceans to describe the huge areas of water which are thousands of miles wide (10)_____and_____ very deep.
III. Read the following passage carefully and choose the best answer to each question. Identify your answer by writing the corresponding letter A, B, C or D on your answer sheet.
One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is basic human right. But acid rain, industrial pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools of poison. Lake Baikal in Russia is one of the largest lakes in the world. It contains a rich variety of animals and plants, including 1,300 rare species that do not exist anywhere else in the world. But they are being destroyed by the massive volumes of industrial effluent which pours into the lake everyday. Even where law existed, the government did not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea occupies 1% of the world’s water surface. But it is the dumping ground for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles off shore.
Water is free to everyone. A few years ago people thought that the supply of clean water in the world was limitless. Today, many water supplies have been ruined by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious source. We should do something now.
1. According to the writer, one environmental problem in the world today is ________ .
A. acid rain B. industrial pollution. C. safe water shortage. D. population explosion .
2. Many sources of water are not drinkable because of _______ .
A. acid rain. B. industrial pollution. C. garbage D. all A, B, C, are correct
3. What is serious problem of Lake Baikal in Russia?
A. It contains a rich variety of animals and plants.
B. It is polluted by massive volumes of industrial wastes discharged into it .
C. It has 1,300 rare species that do not exist anywhere else in the world .
D. The government did not have the power to enforce laws and regulations.
4. How many countries throw industrial waste into the Mediterranean Sea regularly?
A. nearly 16 B. exactly 16. C. exactly 15 D. less than 15.
5. What is the message to the reader?
A. We should take action to protect our water resources.
B. We should take all water resources into account.
C. We should limit the use of water resources.
D. We should encourage people to use safe water.
Fill in each blank in these sentences with the suitable form of the words in brackets.
1. The increase of carbon dioxide in the atmosphere has____effected____ greatly on the earth climate recently. ( effect)
2. Recycling of wastes is one of the ____practice____ solutions for pollution.(practice)
3. ____Develop____countries such as the United States and Japan should help poor countries in many aspects.
(development)
4. Most ____environment____ at the international workshop in Tokyo focused on the increase of the earth temperature.
(environment)
5. Road accident is one of our serious ____sociable____ problems nowadays.(society)
6. Sir Isaac Newton was an English ____standy____ scientist(stand)
7. The ___equipment_____ for modern school takes a lot of money. (equip)
8. It seems ___possible_____ to inhabit on the dark side of the moon. (possible)
9. The internet has ____surprise____ developed in Vietnam. (surprise)
10. I like watching the news best because it is very ___information_____(inform)
11. They have ____moderned____ the Aodai by printing lines of poetry on it. ( modern)
1.on
2.cover
3.the
4.in
5.moving
6.for
7.have
8.describle
9.is
10 .and
I fill in the blank of the following passage with one suitable word.Write your answer on your answer sheet
there is much more water than land..ON.......the surface of the earth .The sea and oceans.....COVER....nearly four-fifths of the whole world , and only one-fifths of the whole world and only one fifth of....THE....... land. If you traveled over the earth .....IN....different directions you would have to spend much more of your time.......MOVING.....on water than on roads or railways .We sometimes forget that......FOR....every mile of land there is four miles of water
there is much water on the surface of our earth that we ..HAVE.......to use two words to describe. We use the word seas to...DESCRIBE..... those parts of water surface which...IS........ only a few hundreds of milea wide the word oceans to describe the huge ares of water which are thousands of miles wide.....AND.....very deep
Fill in each blank with one suitable word to complete the passage below.
In July 1994 Jupiter, the largest planet in our solar system, was struck (1) ………by……… 21 pieces of a comet. When the fragment landed in the southern hemisphere of the giant planet, the explosions (2) ………were……… watched by astronomers here on Earth. But what if our planet was hit by a comet? The year is 2094. It has (3) …………been…… announced that a comet is heading towards the Earth. Most of it will miss our planet, but two fragments (4) ………will……… probably hit the southern hemisphere. On 17 July, a fragment four kilometers (5) ………wide………enters the Earth’s atmosphere (6) ………with……… a massive explosion. About half of the fragment is destroyed and pieces are scattered through the atmosphere. But the core survives and hits the South Atlantic at 200 times the (7) ……speed………… of sound. The sea boils and a huge hole is made in the sea bed. An enormous tidal (8) ……wave………… is created and spreads outwards from the hole. The wall of water, a kilometer high, rushes towards southern Africa at 800 kilometers (9) ………an……… hour. Cities on the African coast are totally destroyed and millions (10) ………of……… people are drowned. The wave moves into the Idian Ocean and heads towards Asia.