—How much farther shall we have to go?

   —Another five miles until we reach the mountain

         ______ .

A. at a distance       B. in a distance

C. at distance        D. in the distance

14. The media can often help solve problems and draw attention ﹍﹍situations﹍﹍help is needed.

A. in; that       B. to; which

C. in; where      D. to; where

He is taller than he ______.

A. used        B. used to be

C. used to      D. used to do

--- Can you attend tomorrow’s meeting?

  --- I am sorry, but I will have too much work ______.

 A. to see to to come  B. seeing to come

 C. to see to coming   D. doing to come

13. The factory produced many famous cars, none of ____ shipped to foreign countries.

 A. them  B. which  C. it  D. what

“You can’t catch me!” Janet shouted, __________ away.

             A．run           B．running         C．to run     D．ran

Ero Carrera is watching the computer screen in a lab in California as he tracks a new computer virus slowly circling the globe, targeting cell phones. Working from the US office of the Finnish computer   21   firm, Carrera knows this virus could be the start of something big and   22  . He’s one of a couple of hundred “virus hunters” worldwide who guard computers and cell phones from   23  . That’s the job for these unlikely action heroes of the Internet age, where quick and curious minds are more important than strong   24  .

    Carrera works with Tzvetan Chaliavski to form the two-man team in California. Like that of other employees in the anti-virus companies in the world, their work is at the battle front of providing   25   from the damaging of computer virus, worms and Trojans. They break down software to discover a new virus and crack its code. Then they   26   and ship out a software update to customers. Roughly 300 new samples of viruses await the pair on a(n)  27   day.

    Carrera has created a mathematical formula(公式), to   28   easily the software structure of viruses. With it, he is better able to compare the many variants(变种) and families of malware(恶意软件). To his   29  , Chaliavski, it doesn’t even matter why someone would create a virus. All that   30   is the hunt.

21. A. advertising          B. commercial                     C. printing                    D. security

22. A. admiring             B. exciting                    C. inviting                    D. threatening

23. A. attack                 B. bombing                  C. competition                     D. struggle

24. A. heads                  B. feelings                    C. muscles                    D. spirits

25. A. access                 B. contact                     C. measures                  D. protection

26. A. copy                   B. create                    C. delete                    D. download

27. A. average               B. original                    C. previous                   D. special

28. A. get off                B. make out                  C. pick up                    D. take in

29. A. assistant              B. manager                   C. partner                            D. secretary

30. A. ignores               B. matters                     C. overlooks                 D. rejects

The government is trying to do something to_____ better understanding between the two countries.

A.     raise  B.promote  C.appeal  D.arise

       Against the supposition than 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 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 next several centuries as 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 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 predicated, 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.

46. 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

47. 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

48. 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

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

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

50. 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

-----Did you remember to pay the telephone bill?

------The telephone bill? ______.

A. That isn’t due yet.  B. Are you sure    C. My telephone is out of order   D. Please remember the amount