69.The underlined expression “get hooked on” probably means_____.

A. become interested in    B. get tired of     C. give up    D. take no interest in

68. The drop in teen smoking has a lot of causes Except ______.

A. educating kids about smoking risks   B. efforts from health experts and organizations

C. the higher price of cigarettes        D. the cutdown of the number of cigarettes

67. The rate of teen smoking among 12^th grades dropped by_____according to the survey.

A.7%     B. 30%      C. 9%      D. 21 %

In the survey, over 44,000 students in grades 8, 10 and 12, from 424 schools across the country were asked about their smoking habits. The results show that smoking among 8th graders went down from 21 percent in 2002, to 12 percent in 2007. In the same period, smoking dropped from 30 % to 21 % among 10th graders and from 37 % to 30 % among 12th graders.

Anti-smoking organizations think educating kids about smoking risks are the cause of the drop. "These important drops in teen smoking did not just happen by chance," says study director Lloyd D. Johnston. "A lot of individuals and organizations have been trying to bring down the high rates of teenage."

Others say the higher price of cigarettes is an important reason teens are cutting back.

Whateve the reason, the drop in teen smoking is good news to everyone, even cigarette-making companies who warn their product is only for adults, not kids. Health experts are particularly paying attention to teenage smoking habits because lifetime smokers often get hooked on smoking at an early age.

But some say that the new figures aren't exactly cause for celebration. While it is true fewer teens are smoking today than five years ago, the rate of teen smoking is still higher than it was.

Cigarette smoking is the leading cause of preventable death and disease in this country. "Our survey suggests that a lot of teens still do not understand the dangers of smoking, particularly the younger teens," Johnston said.

66. The last paragraph implies that______.

A. positive and negative emotions have good aspects

B. people who have been less positive tend to catch colds

C. keeping an optimistic state of mind is good for health

D. positive emotions have a stronger effect on health

D

An survey done by the University of Michigan shows a big drop in the number of teenagers who say they smoke cigarettes.

65. According to the finding a leading factor of catching colds should be one’s ______.

A. health.    B. personality.   C. quality   D. mood

64. The word “full of vim and vigor”underlined in Paragraph 1 probably means______.

A. ignorant    B. well-informed   C. energetic    D. in low spirits

63. What is the text mainly about?

A. how to get rid of colds      B. Attitude determines life

C. Smiles turn away colds     D. Different opinions about colds

　62．The way to stop water pollution is to________.

　　A. realize the serious situation clearly

　　B. put oxygen into the river

　　C. make the waste material hamless before flowing into the water

　　D. make special room in the sea for our rubbish

C

People who are cheerful and relaxed are less likely to suffer from colds. It's possible that being full of vim and vigor helps the body fight illnesses, say the researchers from Carnegie Mellon University (CMU) in Pittsburgh.

"We need to take more seriously the possibility that a positive emotional style is a major player in disease risk," says psychologist Sheldon Cohen, the study's lead researcher. 

In a previous study, Cohen and his colleagues found that people who tended to be cheerful and lively were least likely to develop sniffles, coughs, and other cold symptoms(症状).   

Those findings were interesting, but they didn't prove that a person's attitude affects whether he or she gets sick. Instead, it was still probable that a person's underlying personality is what matters.

Evidence suggests, for instance, that certain people are naturally more likely to be outgoing and optimistic, with high self-respect and a sense of control over life. This would mean that who we are, not how we feel, finally decides our chances of catching colds.

To figure out which mattered more (personality or emotions), the CMU team interviewed 193 healthy adults. The researchers talked to each person over the phone every evening for 2 weeks. They told the researchers about the positive and negative feelings they had experienced that day.

The results showed that everyone in the study was equally likely to get infected. Their symptoms, however, differed depending on the types of emotions that they had reported over the previous 2 weeks.

Among those who reported good moods and had been infected with the flu virus, for example, 28 percent developed coughs and stuffy(堵塞)noses. On the other hand, those symptoms struck 41 percent of people who had been less positive. Scientists argue about whether negative emotions or positive emotions have a stronger effect on how healthy we are. For now, it can't hurt to look on the bright side more often than not!

　61．Which of the following is harmful according to the passage?

　　A. Organisms

　　B. Plants and plankton in the water

　　C. Waste water from cleaning

　　D. Industrial waste made clear before flowing into the water.