Feeling lonely can make you sick. Doctors have long known that loneliness can cause many health problems and even death. What they didn’t know is   16  this feeling causes illness. A study in the online magazine Genome Biology  17  that loneliness actually influences the important part of our bodies—our genes.
In a small population of patients, researchers   18  more than 20,000 genes to compare how the genes of lonely and non-lonely individuals (个体) express themselves in molecular processes (分子过程) and in personal health. They found that gene expression is   19  in chronically (长期地) lonely people. “We now have a new way for understanding the relationship   20   social experience and physical health,” explains the study’s lead author, Steve Cole of University of California, Los Angeles.
“This study—the first to link (联系)   21  with gene changes—is special and exciting,” says Emma Adam, a professor of human development at Northwestern University. “It   22  in the black box.”
According to John Cacioppo, an author of the study from the University of Chicago, the
work suggests that loneliness is a warning   23 , much like physical pain. “This feeling is so bad because   24  of us wants to be forgotten; that’ s also what human means,” he says. “It makes us   25  for other people and want to be with friends when we’re lonely.”

Feeling lonely can make you sick. Doctors have long known that loneliness can cause many health problems and even death. What they didn’t know is   16   this feeling causes illness. A study in the online magazine Genome Biology   17   that loneliness actually influences the important part of our bodies—our genes.

In a small population of patients, researchers   18   more than 20,000 genes to compare how the genes of lonely and non-lonely individuals (个体) express themselves in molecular processes (分子过程) and in personal health. They found that gene expression is   19   in chronically (长期地) lonely people. “We now have a new way for understanding the relationship   20    social experience and physical health,” explains the study’s lead author, Steve Cole of University of California, Los Angeles.

“This study—the first to link (联系)   21   with gene changes—is special and exciting,” says Emma Adam, a professor of human development at Northwestern University. “It   22   in the black box.”

According to John Cacioppo, an author of the study from the University of Chicago, the

work suggests that loneliness is a warning   23  , much like physical pain. “This feeling is so bad because   24   of us wants to be forgotten; that’ s also what human means,” he says. “It makes us   25   for other people and want to be with friends when we’re lonely.”

1.A. when           B. where       C. how              D. if

2.A. explains           B. talks     C. replies         D. answers

3.A. collected      B. grew             C. found            D. surveyed

4.A. important      B. different    C. interesting          D. difficult

5.A. in             B. between     C. about             D. both

6.A. work           B. health       C. life             D. feelings

7.A. fills              B. makes        C. builds           D. repairs

8.A. note           B. sign             C. sound       D. picture

9.A. each           B. nothing          C. any              D. none

10.A. look          B. live             C. care             D. think

阅读理解

　　SARS is a dangerous new illness. Doctors are trying to find out what causes it. They are working hard to find a treatment(治疗方法) for it.

　　The letters SARS stand for severe acute respiratory syndrome(严重急性呼吸综合征). The first cases of SARS were in Guangdong and Hong Kong in China. Travelers spread(传播) SARS to many other cities. By June 6 there were more than 5320 cases of SARS in our country and nearly 340 died from it.

　　SARS seems to be spread when a sick person coughs or sneezes, even breathes. People who stay in the same place with SARS patients or who come close to them, may catch it. It may be spread by touching things that a SARS patient has touched. Doctors isolate(隔离治疗) people ill with SARS, and they have to quarantine(隔离) those who are close to SARS patients. Those who travel to or from a SARS city and seem to have any cases of SARS should be quarantined. They should not go to work, school or any other public place. Quarantine helps prevent SARS from spreading.

　　SARS usually begins with a fever, a headache, and body aches. People ill with SARS have a dry cough and trouble breathing.

　　To protect ourselves away from SARS, we should do more exercise, wash our hands often, and open windows to let fresh air in.

根据短文内容，在每句空格内填写一词，使句意完整．

1．From the passage we know that doctors haven't found out ________ ________ SARS now.

2．SARS patients usually have the symptoms(症状)of ________, cough, headache and ________ breathing.

3．SARS is a dangerous spreading ________, so those who are close to SARS patients or who have been to SARS cities should be ________ for 2 weeks or more.

4．SARS is spread by SARS patients breathing, ________ or ________.

5．In order to keep away from SARS, each of us should keep ourselves ________ and do more physical ________.