The layer thought it unfair for his client to ten years in prison just because he had helped the robbers escape. A. to be sentenced B. to sentenced to C. to be sentenced to D. have sentenced to 题目和参考答案——青夏教育精英家教网—

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The layer thought it unfair for his client to _______ ten years in prison just because he had helped the robbers escape.

　 A. to be sentenced　 B. to sentenced to　 C. to be sentenced to D. have sentenced to

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Damage to Ozone Layer Gets Worse

In the middle of winter, when snow is falling in many parts of the United States, scientists have sounded a warning to people who plan to spend many hours in the sun this summer．The warning: The sun's summertime rays are more dangerous than once thought.

A team of scientists from 80 nations recently reported to the United Nations that a layer of ozone（臭氧层）in the atmosphere, which protects humans from harmful levels of ultraviolet（紫外线）radiation, will be thinner over the United States this summer．The thinner layer allows more ultraviolet rays from the sun to reach Earth．The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer.

Scientists first became concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter．The hole was caused in chemicals used in refrigerators and air conditioners．When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone.

Concern about the protective ozone layer rose more recently when data from satellites and ground stations showed that ozone levels were dropping over areas other than Antarctica．Low ozone levels were recorded in the spring and summer over the United States and over other populated areas in the world.

Although many countries have already begun stopping the use of ozone-destroying chemicals, the new findings are expected to advance the timetable for a total ban of the chemicals.

The scientists have observed the ozone layer ______．

A．since 1980 B．since last winter

C．for more than 20 years D．for about one year

The ozone layer in the atmosphere can ______.

A．do a lot of good to human beings in many ways

B．protect humans from diseases caused by bad weather

C．do a lot of harm to human beings in the summer-time

D．protect humans from harmful levels of ultraviolet radiation

Scientists first found that there was a hole in the ozone layer ______.

A．above Arctic during the winter in the mid-1980s

B．above Antarctica during the winter in the mid-1980s

C．over somewhere in the north of the equator in 1980

D．over the USA in the summertime in the mid-1980s

The damage to the ozone layer was caused by ______.

A．the changeable weather B．ozone-destroying chemicals

C．chemicals from refrigerators D．chemicals from air conditioners

Have you ever noticed the colour of the water in a river or stream after a heavy rainfall? What do you think caused this change in colour? It is soil that has been washed into the river from the riverbank or from t}le nearby fields．

Components of Soft

Soil is made up of a number of layers（层），each having its own distinctive colour and texture．The upper layer is known as the litter．It acts like a blanket．limiting temperature changes and reducing water loss．The topsoil layer is made up of small particles of rock mixed with rotten plant and animal matter called humus（腐殖质），which is black and gives the topsoil its dark colour．This layer is usually rich in nutrients，oxygen，and water．Below the topsoil is the subsoil，a layer that contains more stones mixed with only small amounts of organic matter．This layer is lighter in colour because of the lack of humus．Beneath the soil lies a layer of bedrock．

Soil forms from the bottom up．Over time bedrock is attacked by rain, wind，frost, and snow．It is gradually broken down into smaller particles in a process called weathering．Plants begin to grow，and rotten materials enrich the topsoil．Most of the soil in Eastern Canada．for example．Was formed from weathered rock that was exposed when the ice disappeared l2．000 years ag0．

Water Beneath the Soil

Surface water collects and flows above the ground in lakes．ponds．and rivers．Once in the soil or rock，it is called groundwater．Gravity pulls groundwater through the soil in a process called percolation（渗透）．Eventually the water reaches a layer called the water table．Under this is bedrock through which water cannot percolate．

As water percolates downward，it dissolves organic matter and minerals from the soil and carries them to deeper layers．This causes a serious problem because plants require these nutrients for growth.

Soil pH

Soil can be acidic．neutral．or basic．The pH of the soil is determined by the nature of the rock

from which it was formed．and by the nature of t}le plants that grow and rot in it．

The acidity of rain and snow can lower the pH of the groundwater that enters the soil．By burning fossil fuels such as coal，oil and gasoline，humans have been contributing to higher levels of acidity in many soils．When fossil fuels are burned．gases are released into the air and then fall back to earth as acid rain．Acid soil increases出e problem of carrying nutrients to lower soil levels．As nutrients are removed，soil is less fertile．Plants grow more slowly in acidic soil，and also become easily attacked by diseases．

67．The layer of soil that provides necessary nutrients for plant growth is called．

A．1itter B．topsoil C．humus D．subsoil

68．According to the text．which of the following is NOT true?

A．Soil forms from weathered rock on the earth surface．

B．The deeper layer of soil is darker in colour than t}le surface soil．

C．Air pollution is partially responsible for acid soil．

D．Groundwater tends to carry away nutrients for plant growth．

69．We can infer from the passage that the water table lies ．

A．between the topsoil layer and the subsoil layer

B．in the subsoil layer above bedrock

C．between the subsoil layer and bedrock

D．in the bedrock layer beneath the subsoil

70．The underlined word “dissolve” is used to express the idea that organic matter and minerals from soil are ．

A．rushed away into the river

B．cleaned and purified by water

C．destroyed and carried away by water

D．mixed with water and become part of it

People who are outdoors in cold weather should avoid actions like suddenly lifting a heavy basket full of snow. Even walking through heavy, wet snow can strain a person’s heart.
Many people aren’t conditioned to the physical stress of outdoor activities and don’t know the dangers of being outdoors in cold weather. Those who like winter sports can suffer accidental hypothermia if they don’t make certain preparations.
Hypothermia means the body temperature has fallen below normal. It occurs when your body can’t produce enough energy to keep the internal (内部的) body temperature warm enough. It can kill you. Heart failure causes most deaths in hypothermia.
Children, the elderly and those with heart disease are at special risk. As people age, their ability to keep a normal internal body temperature often decreases. Elderly people can suffer hypothermia without knowing they’re in danger because they can’t notice the cold conditions as quickly as the young.
Besides cold temperatures, high winds, snow and rain can also steal body heat. Wind is especially dangerous because it removes the layer of heated air from around your body. At 30 degrees Fahrenheit in a 20-mile-per-hour wind, the cooling effect is equal to calm air at four degrees. Similarly dampness (湿气) causes the body to lose heat faster than it would at the same temperature in drier conditions.
To keep warm, wear more clothes. This traps air between layers. Also, wear a hat or head scarf. Much of your body’s heat can be lost through your head. Keep your hands and feet warm, too, as they tend to lose heat rapidly.
Don’t drink alcohol before going outdoors or when outside. Alcohol makes you feel warm at first because blood vessels in the skin expand. But heat is then drawn away from the body’s important organs.
【小题1】The underlined word “strain” in Paragraph 1 means ________.

【小题2】What is implied in the passage about hypothermia?

A．It means the body temperature falls rapidly.	B．Most heart attacks are caused by it.
C．It is not as scary as people think.	D．It can threaten a person’s life.

【小题3】 Based on the passage, one of the reasons why the elderly are at special risk of suffering from hypothermia is that _______.

A．they like exercising outside in cold mornings

B．they can’t notice cold conditions if they are not told

C．their body temperature is generally lower than young people’s

D．their ability to keep a normal internal body temperature is not so good

【小题4】What is Paragraph 5 mainly about?

A．What causes the body to lose heat faster.	B．The advantages of drier conditions.
C．What else can steal body heat.	D．Dangers of high winds.

【小题5】Which of the following is NOT a result of drinking alcohol before going outdoors?

A．Feeling warm at first	B．The body’s heat is taken away
C．Blood vessels in the skin expand	D．The risk of hypothermia is reduced

根据短文内容，从短文后的A-G选项中选出能填入空白处的最佳选项。选项中有两项为多余项。
Everyone tries instant noodles方便面. It is very easy to cook by putting them into the boiling water and add in those MSG(味精) packets. However, have you ever wondered whether this is the correct way of cooking it? ___【小题1】____ .In order to make the noodles join together nicely side by side and achieve beautiful instant noodles in front of us, some form of wax coating涂蜡 is needed. __【小题2】__. It is advisable to have a break of 2-3 days before we start to eat another packet of instant noodles as our bodies need about 3 days to clear that layer of wax coating away from our system. Do you know the danger of having too much wax coating stored in our stomach? __【小题3】
Here are the key points to take note of while preparing instant noodles.
____【小题4】____.
Repeat Step 1 and try to stir the noodles again to wash away the wax coating on the noodles before cooking it in a new pot of water.
The importance is not eating too many instant noodles. It is very important that we should follow the key points while having our meal of instant noodles.
___【小题5】____..

A．Nothing is more important than health, so drink enough water.

B．However, the layer of wax coating on the noodles is quite harmful.

C．It is very easy to cook instant noodles, but we must take note of the harm of it.

D．When you first see the noodles, you will notice them nice.

E. Wash the instant noodles.
F. Wash and stir with warm water.
G. It will lead to cancer if it is stored in our body for long.