2017年公共英语pets3级真题及答案.pdf

2017年公共英语pets3级真题及答案 SECTION 11 Use of English ( 15 minutes) Directions: Read the following text. Choose the best word or phrase for each numbered blank and mark A, B,C, or D on your ANSWER SHEET. It isanunfortunatefactoftodayslifethatmostpeoplearegrowing up unable to see the stars. The prime night sky exists only 26pictures. This is true not only in cities and suburbs, but al-so in 27areas. We have lost our view of the stars and 28our nighttime environment as well. Such a loss29be acceptable if light pollution were the inevitable priceofprogress, 30it isnot.Most sky glow is31. It comesmainly from lightingsourcesthatdolittletoincrease32safety,securityorutility. They produce only glare,33over one billion dollars annually in the U.S. alone. 34science,theimpacthasbeenevenmoredramatic.Scientistsrequire observationsof extremely faintobjectsthatcan onlybe35with advanced devicesatsites36ofairpollu-tionandurban skyglow.Forexample, some images of the objects can 37information about faraway comers of the universe, helping us understand the way in 38our world was actually formed.39 , the light from these objects can be lost at the very end of its 40 in the glare of our own sky. Reducinglightpollution isnotdifficult.It41thatpublicofficials and citizens be 42of the problem and act to counter it. As 43people can help reduce sky glow just by 44 lighting only when necessary. The stars above us are a 45heritage. We must do our best to preserve it. 26. A. on B. fromC. inD. at 27. A. local B. rural C. industrial D. scenic 28. A. mined B. reduced C. dirtied D. wasted 29. A. should B. may C. might D. will 30. A. but B. as C. because D. though 31. A. inadequate B. invisible C. unpredictable D. unnecessary 32. A. nighttime B. lifetime C. peacetime D. longtime 33. A. costing B. making C. putting D