Against the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees allow more snow to mirror more sunlight into space.

    This finding suggests that taking steps to prevent northern forest fires to limit the release of greenhouse gases may warm the climate in northern regions. Usually large fires destroyed forests in these areas over the past decade. Scientists predict that with climate warming, fires may occur more frequently over the next several centuries as a result of a longer fire season. Sunlight taken in by the earth tends to cause warming, while heat mirrored back into space tends to cause cooling.

    This is the first study to analyze all aspects of how northern fires influence climate. Earlier studies by other scientists have suggested that fire in northern regions speed up climate warming because greenhouse gases from burning trees and plants are released into the atmosphere and thus trap heat.

    Scientists found that right after the fire, large amounts of greenhouse gases entered the atmosphere and caused warming. Ozone（臭氧） levels increased, and ash from the fire fell on far-off sea ice, darkening the surface and causing more radiation from the sun to be taken in. The following spring, however, the land within the area of the fire was brighter than before the fire, because fewer trees covered the ground. Snow on the ground mirrored more sunlight back into space, leading to cooling.

    “We need to find out all possible ways to reduce the growth of greenhouse gases in the atmosphere.” Scientists tracked the change in the amount of radiation entering and leaving the climate system as a result of the fire, and found a measurement closely related to the global air temperature. Typically, fire in northern regions occurs in the same area every 80 to 150 years. Scientists, however, found that when fire occurs more frequently, more radiation is lost from the earth and cooling results. Specifically, they determined when fire returns 20 years earlier than predicted, 0.5 watts per square meter of area burned are soaked up by the earth from greenhouse gases, but 0.9 watts per square meter will be sent back into space. The net effect is cooling. Watts are used to measure the rate at which energy is gained or lost from the earth.

According to the new findings, taking steps to prevent northern forest fires may __________.

A. result in a warming climate     

B. cause the forest fires to occur more frequently

C. lead to a longer fire season            

D. protect the forests and the environment there

The following are all the immediate effects after a forest fire EXCEPT __________.

A. large amounts of greenhouse gases enter the atmosphere

B. the levels of ozone which is a type of oxygen increase

C. snow on the ground mirrors more sunlight back into space

D. ashes from the fire fall on the ice surface and take in more radiation from the sun

Earlier studies about northern forest fires __________.

A. analyze all aspects of how northern fires influence climate

B. indicate that forest fires will pollute the atmosphere

C. suggest that people should take measures to protect environment

D. suggest that the fires will speed up climate warming

The underlined phrase “soak up” in the last paragraph most probably means __________.

A. released         B. absorbed       C. created      D. distributed

From the passage we can draw a conclusion that forest fires in Alaska, Canada and Siberia may __________.

A. warm the climate as the supposition goes

B. allow more snow to reflect more sunlight into space and thus cool the climate

C. destroy large areas of forests and pollute the far-off sea ice

D. help to gain more energy rather than release more energy

Lei Feng is always ready to help others when they are in trouble and he never _______ their request.

A. turns up B. turns over  C. turns in D. turns down

We own many , many thanks ___ our teahers  ___ their help.

     A. to, for    B. for, to    C. for, with    D. to . with

China Daily Oct．11．2008-TheMinistry Of Health has called for more awareness from the public on the mental health of the young．as part of efforts to mark World Mental Health Day which fell on Friday．

More than 15 percent of Chinese youths have been found with mental problems．and about 30 million young people under 17 are suffering from depression，the Shanghai-based Wenhui Daily reported．The World Health Organization estimates that before 2020，the rate of children with mental problems will increase to 50 percent ,and mental problem will become a major factor behind deaths and illness in the young worldwide．

Dang Xianhong，the spokesperson for the Beijing Municipal Health Bureau，said rapid

social change is one of the reasons behind the rising number of youngsters with psychological problems．If these mental dispenses are not addressed on time, science of crimes，drug-taking

and other dangerous behaviors are expected to rise．Experts said mental diseases could be caused by many factors，such as the inability to handle interpersonal relations well, unstable emotions and pressures from an overload of studies．A number of expects have also said the one child policy is another reason leading to poor mental health in the young．Children are said to be too “spoiled”and“selfish”in a one child family．

It’s reported that schools in many cities are rolling out measures to help students maintain their mental well-being．Yin Jingmiao, a teacher of the Beijing No，105 Middle School，told China Daily that the school invites psychologists to provide counseling to students three times a month．“Students can be arranged to have 40-minute counseling sessions.” Yin said．“The school also gives lectures on mental health to senior grade students before they take the national college entrance exams to help ease any anxiety arising from the tests．”

Which of the following can be the best title for the passage?

A．Efforts to Mark World Mental Health Day

B．Public Awareness on Youngsters’Mental Diseases Expected

C．How to Maintain Mental Well-being

D．Seriousness of Youngsters Mental Health Problems

The writer intends to tell us in the second paragraph that _____.

A．metal problems will become as serious as deaths and illness

B．only young people are suffering from metal health problems

C．mental health problems of the young are becoming a popular problem

D．the rate of children with mental problems will increase to 50 percent

Which could be the consequence if the problem is left untreated?

A．Inability to handle interpersonal relations．

B．Unstable emotions．

C．Drug．taking and other dangerous behaviors．

D．Rapid social changes

Why is Beijing No．105 Middle School mentioned in the passage?

A．To provide the students with counseling sessions．

B．To give an example showing how mental problems are dealt with．

C．To help ease the anxiety arising from college entrance exams．

D．To call on other schools to learn from No．105 Middle Schoo1．

阅读下列材料， 从所给的六个选项（A, B,C, D, E, F）中， 选出符合各个小题要求的最佳选项，选项中有一项是多余选

以下是复活节的活动介绍:

A. Second Church in Dorchester sponsors Easter Egg Hunt

Join the fun at the Second Chruch in Dorchester’s Easter Egg Hunt, Saturday, March 15, 2008 at 12 noon. Children aged 12 and younger are invited to the Church Lawn at the corner of Washington St. and Talbot Ave. in Codman Square to search for the hidden candy-filled egg. Bring your own basket.

This free event is fun for the whole family.

For more information call 617-825-2797, visit the website at http://www.secondchurchchnaz.org,

or email info@secondchurchnaz.org.

B. Choate Park Easter Egg Hunt

The Easter Bunny will visit Choate Park this year and will hide thousands of Easter eggs throughout the historic town park for kids to find! The special day is Saturday, March 15, at 11 a.m. at Choare Park in Medway. The Easter Egg Hunt costs $5 per child over the age of 2, and is open to children up to ten years old. Pre-registration suggested at cholatefriends@yahoo.com or by calling 508-533-3275 so there will be enough eggs for everyone.

C. Billerica Breakfast with Easter Bunny

http://www.town.billerica.ma/us/cities/billericama/docs/UploadPages?recreation.htm#Breakfast

Sunday, March 16,2008

8:30-12 noon

Shawsheen Valley Technical School Cafeteria

100 Cook Street, Billerica

$5.00 per person for a GREAT Meal and LOADS of fun!

(Includes breakfast, photo with Easter Bunny, egg hunt, hat parade, face painting & crafts!)

D. Burlington—FLASHLIGHT AT NIGHT EASTER EGG HUNT

http://www.burlington.org/reaction//Special Events.htm

Thursday, March 20, 2008

The Easter bunny will be making a special trip to Burlington to hide some eggs for Easter. This year the Easter bunny will be hiding eggs in two separate locations. Bring your flashlight and a parent and help us find the eggs that are scattered about the Town Common and Simonds Park. The Easter Bunny will be on hand for pictures, so bring your camera. The Easter egg hunt is open for residents only who have signed up and have a ticket. This is for children ages 2-5 with a parents and tickets are $6 each.

E. Wilmington

http://www.towm.wilmington.ma.us/old/rec.htm

EASTER EGG HUNT (Town Common)

The Annual Easter Egg Hunt for children aged 6 and younger will be held on Saturday, March 22 on the Town Common. In case of poor weather or ground

F. Methuen Easter Egg Hunt

http://www.ci.methuen.ma.us/

Saturday, March 22, 12:00 Noon at Veterans Park on Milk Street

Children must be accompanied by an adult. Bring a Basket! Special Appearance by the Easter Bunny!!!

Ages: Preschool to 3rd Grade.

Information: 978-983-8590

请根据下面家长和小孩的信息，为其挑选合适的活动。

76.Mr. Brown. My son is 5 years old. He loves Easter Egg Hunt. But this time I won’t be free until Saturday afternoon, March 22.

77. Mrs. Houston My husband and I will be free on March 15, so we would like to take our kid, Jason, 12, to join in some free events.

78．Mr. Robinson Judy, my daughter, is 3 years old. She loves the Easter Bunny so much that she will be happy to take a picture with it.

79．Mrs. Ryan I am available before noon on March 15 so I am taking my boy, Justin, aged 8, to try for the egg hunts.

80. Mr. William Besides egg hunts, my boy would also like to watch other performance, such as parade and painting.