-Without proper planning, tourism can cause problems．For example, too many tourists can crowd public places that are also enjoyed by the inhabitants(居民) of a country. If tourists create too much traffic, the inhabitants become annoyed and unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help the country’s economy. It is important to think about the people of a destination(目的地) country and how tourism affects them. Tourism should help a country, keep the customs and beauty that attract tourists．Tourism should also advance the wealth and happiness of local inhabitants.

　　Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work in the tourism industry. This means that other parts of the country’s economy can suffer.

　　On the other hand, if there is not enough tourism，people can lose jobs. Businesses can also lose money. It costs a great deal of money to build large hotels, airports，air terminals, first－class roads, and other support facilities（设施）needed by tourist attractions. For example, a major international class tourism hotel can cost as much as 50 thousand dollars per room to build. If this room is not used most of the time, the owners of the hotel lose money.

　　Building a hotel is just a beginning．There must be many support facilities as well，including roads to get to the hotel, electricity, sewers to handle waste, and water. All of these support facilities cost money. If they are not used because there are not enough tourists, jobs and money are lost.

1.Which of the following has most probably been discussed in the part that goes before this passage?

2.Too much tourism can cause all these problems EXCEPT ________.

3.Not enough tourism can lead to ________.

4.The underlined word “handle” in the last paragraph most probably means _________.

C
American teens are setting an example for their parents through their volunteer work,
according to a new poll by Harris Interactive. The random national telephone survey released this week by the charity World Vision found that more teens volunteer to support a charitable cause（56 percent） than have a part-time job（39 percent）.
Parents said 82 percent of the teens in their lives do something to support charitable causes, including volunteering, recruiting others to a cause, wearing a button or T-shirt or donating money. Forty-six percent of the adults surveyed said they volunteer their time, but they also take credit for inspiring their children to volunteer.
The Harris Interactive poll was conducted in the United States between Jan 29 and Feb 2 among 2,003 adults. Sara Johnson, a teacher who advises students at a private school in a Chicago suburb, says she's seen a resurgence of teen involvement in social causes since President Barack Obama was elected in November.
The Harris Interactive survey found a quarter of teens have become more involved in charitable causes or organizations as a result of the economic downturn, but the economy has also led to cuts in allowances, and has teens working more hours at a paying job.
Unlike many public high schools across the nation, Illiana Christian does not require its students to clock public service hours. Senior Melissa Martin said some kids are too busy with other commitments like sports and music, but most of her classmates do volunteer.
Alynn Woodson, director at Habitat for Humanity International, said she has noticed a new enthusiasm among teen volunteers for the organization. Habitat for Humanity celebrates the 20th anniversary of its alternative spring break program this year and is expecting more than 12,000 young people to help build homes for low-income people around the nation.
63．What’s the main idea of the passage?
A．It is surveyed that more teens volunteer to support a charitable cause nowadays.
B．Illiana Christian asks its students to clock public service hours strictly.
C．American parents are setting an example for their children through their volunteer work.
D．The financial crisis led to the employment of American parents.
64．The underlined word “resurgence” in the third paragraph most probably means      .
A．replacement     B．recall C．review      D．return 
65．Which of the following statements is NOT TRUE according to the passage?
A．About 12,000 young people will help build homes for low-income people around the nation.
B．In Illiana Christian, teens are busy with sports and none of them do volunteer.
C．The majority of the teens in their lives do something to support charitable causes.
D．Forty-six percent of the adults surveyed said they volunteer their time.
66．We may infer from the passage that          .
A．American teens prefer charitable causes to attending school.
B．People noticed a new enthusiasm among teen volunteers for the organization.
C．The majority of the adults are not willing to volunteer their time.
D．Habitat for Humanity celebrates the 20th anniversary this year.

Dr. Martinez put on a false smile (假笑) as she entered Janet Eslin’s hospital room. She couldn’t let Janet see that she was worried. Yet she had been searching for the cause of Janet’s illness and hadn’t found a clue（线索）.
“How are you feeling today?” Dr. Martinez asked her patient. Janet replied that she felt about the same----terribly uncomfortable.
The doctor tried to get Janet’s mind off her health by talking about Janet’s vacation at Lake Winnow. But Dr. Martinez couldn’t keep her own mind on the conversation. She kept wondering what could be wrong with her patient.
Suddenly Janet’s words interrupted Dr. Martinez’s thoughts: “… the vacation was really perfect, except for the food. The last meal I ate was especially terrible.”
Dr. Martinez quickly snapped back into the conversation, “Janet, when did you eat that meal?” Janet said that it had been the day before yesterday.
“I think we’ve discovered your problem,” Dr. Martinez said as she left. Several hours later, Dr. Martinez was back with the answer. “Janet, the food you ate made you ill. You’re suffering from food poisoning. Now that we know what’s wrong, we can take care of your problem.”
【小题1】What made Janet sick?

.

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 is: 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 radiation（紫外线辐射）, 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 ozone layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter. The hole was caused by 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(数据) 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(禁止) of the chemicals.

59.   The scientists have observed the ozone layer_____.

A.  since 1980             B.  since last winter      

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

60. 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.

61. 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 U.S.A in the summertime in the mid-1980s

62.   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

Alzheimer's disease is a major national health problem. Nearly 2 million Americans over the age of 65 have Alzheimer's disease. It is a leading cause of death among the elderly. But Alzheimer's disease is not confined (限于) to the aged. There may be a million or more people under the age of 65 suffering from the disease.
At one time, people suffering from the disease were said to be "getting old". The disease was thought to be a natural part of growing old, but it is now known that Alzheimer's disease strikes young and old alike. It is an organic(器官的) disease that destroys brain cells.
Alzheimer's disease affects the patient's memory, speech, and movement. In the beginning stages of the disease, the patient may seem slightly confused. He may have trouble speaking. Then the patient's memory begins to fail. He may forget dates, telephone numbers, names and plans.
As the disease progresses, the patient may not recognize family and friends. These symptoms(症状) often cause terrible anxiety in the patient. He may feel lost and frightened. Sometimes the patient reacts with wild and bad behavior.
In the last stages of the disease, the patient may not be able to take care of himself. He may have lost the ability to speak and walk.
Some of the scientists think a virus causes Alzheimer's disease. At present, there is no cure for the disease. But there are ways to slow its progress. Exercise and physical treatment can help the patients of this disease.
50. Alzheimer's disease ____________.
A. a terrible part of the aging process                 B. is an organic disease that affects young and old
C. can be cured by physical treatment               D. causes high fever
51. All of the following are symptoms of Alzheimer's disease EXCEPT ____________.
A. brain damage   B. difficulty in speaking    C. loss of sight     D. loss of the ability to walk
52. According to the passage, which of the following may be a cause of Alzheimer's disease?
A. Poisons produced by the brain.        B. Getting old.    C. A virus.       D. Lack of exercise.