Big Brothers Big Sisters is based on the simplicity and power of friendship．It is a program which provides friendship and fun by matching vulnerable young people (ages 7-17) with a volunteer(志愿者) adult who can be both a role model and a supportive friend.

　 Volunteer tutors come from all walks of life—married, single, with or without children. Big Brothers and Big Sisters are not replacement（代替者）parents or social workers. They are tutors: someone to trust, to have fun with, to talk and go to when needed.

A Big Sister and Little Sister will generally spend between one and four hours together three or four times each month for at least twelve months. They enjoy simple activities such as a picnic at a park, cooking, playing sport or going to a football match. These activities improve the friendship and help the young person develop positive self-respect, confidence and life direction.

Big Brothers Big Sisters organizations exist throughout the world. It is the large and most well-known provider of tutor services internationally and has been operating for 25 years.

Emily and Sarah have been matched since 2008. Emily is a 10-year-old girl who has experienced some difficulties being accepted by her schoolmates at school. “ I was pretty sure there was something wrong with me.”

Emily’s mum came across Big Brothers Big Sisters and thought it would be helpful to Emily by “providing different feedback (反馈) about herself other than just depending on schoolmates to value her self-worth.

Sarah wanted to take part in a volunteer program. “I googled it and found out how to be a part of it. I thought it would be fun for me to take part in making time to do something because sometimes it is all work and no play.”

Big Brothers Big Sisters has been helpful and enjoyable to both Emily and Sarah. They love and look forward to their time together and the partnership has certainly helped Emily be more comfortable in being the wonderful, happy and unusually good girl she is!

66．What is the aim of Big Brothers Big Sisters?

A．To offer students public services．

　　　 B．To help students improve their grades．

　　　 C．To organize sport activities for young people．

　　　 D．To provide partnership and fun for young people．

67．A volunteer is usually expected to work within a year for at least______．

　　　 A．24 hours　 B．36 hours　 C．48 hours　 　 D．72 hours

68．According to Emily’s mother, this program may provide Emily with______．

　　　 A．advice from her teachers B．a new way to value herself

　　　 C．a new way to value her schoolmates　　 D．more thoughts from her schoolmates

69．Why did Sarah want to join in the program?

　　　 A．She used to be a volunteer. B．She needed a part-time job.

C. She felt a bit bored with her life. D. She wanted to get a difficult but interesting job.

70．According to the passage, the underlined phrase “vulnerable young people”in the first paragraph are probably those who are _________.

　　　 A．popular at school　 　　 B．rather in good health

　　　 C．easily hurt in feeling　 D．sure about their own ability to do things

Big Brothers Big Sisters is based on the simplicity and power of friendship．It is a program which provides friendship and fun by matching vulnerable young people (ages 7-17) with a volunteer adult who can be both a role model and a supportive friend.
　　Volunteer tutors come from all walks of life—married, single, with or without children. Big Brothers and Big Sisters are not replacement parents or social workers. They are tutors: someone to trust, to have fun with, to talk and go to when needed.
A Big Sister and Little Sister will generally spend between one and four hours together three or four times each month for at least twelve months. They enjoy simple activities such as a picnic at a park, cooking, playing sport or going to a football match. These activities improve the friendship and help the young person develop positive self-respect, confidence and life direction.
Big Brothers Big Sisters organizations exist throughout the world. It is the largest and most well-known provider of tutor services internationally and has been operating for 25 years.
Emily and Sarah have been matched since 2008. Emily is a 10-year-old girl who has experienced some difficulties being accepted by her schoolmates at school. “ I was pretty sure there was something wrong with me.”
Emily’s mum came across Big Brothers Big Sisters and thought it would be of benefit to Emily by “providing different feedback (反馈) about herself other than just relying on schoolmates to measure her self-worth.
Sarah wanted to get involved in a volunteer program. “I googled it and found out how to be a part of it. I thought it would be fun for me to get involved in making time to do something because sometimes it is all work and no play.”
Big Brothers Big Sisters has been of great benefit and enjoyment to both Emily and Sarah. They love and look forward to their time together and the partnership has certainly helped Emily be more comfortable in being the wonderful, happy and unique girl she is!
【小题1】What is the aim of Big Brothers Big Sisters?

Big Brothers Big Sisters is based on the simplicity and power of friendship．It is a program which provides friendship and fun by matching vulnerable young people (ages 7--17) with a volunteer adult who can be both a role model and a supportive friend.

　　Volunteer tutors come from all walks of life --- married, single, with or without children. Big Brothers and Big Sisters are not replacement parents or social workers. They are tutors: someone to trust, to have fun with, to talk and go to when needed.

A Big Sister and Little Sister will generally spend between one and four hours together three or four times each month for at least twelve months. They enjoy simple activities such as a picnic at a park, cooking, playing sport or going to a football match. These activities improve the friendship and help the young person develop positive self-respect, confidence and life direction.

Big Brothers Big Sisters organizations exist throughout the world. It is the largest and most well-known provider of tutor services internationally and has been operating for 25 years.

Emily and Sarah have been matched since 2008. Emily is a 10-year-old girl who has experienced some difficulties being accepted by her schoolmates at school. “ I was pretty sure there was something wrong with me.”

Emily’s mum came across Big Brothers Big Sisters and thought it would be of benefit to Emily by providing different feedback (反馈) about herself rather than just relying on schoolmates to measure her self-worth.

Sarah wanted to get involved in a volunteer program. “I googled it and found out how to be a part of it. I thought it would be fun for me to get involved in making time to do something because sometimes it is all work and no play.”

Big Brothers Big Sisters has been of great benefit and enjoyment to both Emily and Sarah. They love and look forward to their time together and the partnership has certainly helped Emily be more comfortable in being the wonderful, happy and unique girl she is!

31．What is the aim of Big Brothers Big Sisters?

　　　 A．To offer students public services．

　　　 B．To help students improve their grades．

　　　 C．To organize sport activities for young people．

　　　 D．To provide partnership and fun for young people．

32．A volunteer is usually expected to work within a year for at least______．

　　　 A．24 hours　　　　 B．36 hours　　　　 C．48 hours　 　 D．72 hours

33．According to Emily’s mother, this program may provide Emily with______．

　　　 A．advice from her teachers　　　　　　　　　　

　　　 B．a new way to assess herself

　　　 C．a new way to judge her schoolmates　　

　　　 D．more opinions from her schoolmates

34．Why did Sarah want to get involved in the program?

　　　 A．She used to be a volunteer.　　　　　　　　　 B．She needed a part-time job.

　　　 C．She felt a bit bored with her life.　　　　　 D．She wanted to get a challenging job.

35．According to the passage, “vulnerable young people” are probably those who are _________.

　　　 A．popular at school　 　　　　　　　　　　　　 B．rather weak physically

　　　 C．easily hurt emotionally　　 　　　　　　　　 D．very confident in themselves

Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.

A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining.

In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States.

In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline.

Many scientists had believed that the lead would stay in soil and snow for a longer period.

The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected.

Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.

69.   The study published in the journal Nature indicates that ________.

A.    the Clean Air Act has not produced the desired results

B.    lead deposits in arctic snow are on the increase

C.    lead will stay in soil and snow longer than expected

D.    the US is the major source of lead pollution in arctic snow

70.   Lead accumulation worldwide decreased significantly after the use of unleaded gas in the US   _____ .

　A.    was discouraged                  B.    was enforced by law

C.    was prohibited by law           D.    was introduced

71.   How did scientists discover the source of lead pollution in Greenland?

A.    By analyzing the data published in journals like Nature and Ambio.

B.    By observing the lead accumulations in different parts of the arctic area..

C.    By studying the chemical elements of soil and snow in Northeastern America.

D.    By comparing the chemical compositions of leaded gasoline used in various          countries.

72.   The authors of the Ambio study have found that ________.

A.    forests get rid of lead pollution faster than expected

B.    lead accumulations in forests are more difficult to deal with

C.    lead deposits are widely distributed in the forests of the US

D.    the upper layers of soil in forests are easily polluted by lead emissions

They are subject to your　　　,but the final list is to be sent to the manager for his　　　.

1. A.
   obedience;approval
2. B.
   approval;agree
3. C.
   approval;approval
4. D.
   conformity;approval