2014年6月大学英语四级复习题及答案(第三套)_第6页

　　Directions : There are 30 inco9mplete sentence in this part . For each sentence there are four choices marked A) , B) , C) , and D) . Choose the ONE answer that best completes the sentence . Then mark the corresponding letter on the Answer Sheet with a single line through the center .

　　41. The number of _____ species increases every year as natural habitats disappear .

　　A.dangerous B .serious C. endangered D. hazardous

　　42. Aluminum as well as most metals _____.

　　A.is a good conductor B. is a good insulator C. are good conductors D. are good insulators

　　43. Outline are used most often to ______the contents of long complex papers before the actual writing begins .

　　A.sketch B. illustrate C. draw D. describe

　　44. There are ten on the list , so you are _______.

　　A . an eleventh B . the eleventh C . an eleven D . eleven

　　45. To get a high score ______.

　　A . working hard is needed B . one must work hard .

　　C . working hard is very important D . requirement is what needed

　　46 . “ I’m tired , but let’s go”

　　“ Why ____ rest a while ?”

　　A.let’s B. not let’s C . not D . let’s not

　　47. I shall never allow you to marry the poor girl and you are not may son if you _____.

　　A . have B . married C . do not D . do

　　48. He is _____ of a musician .

　　A . anybody B. anyone C . somebody D . something

　　49. William the Conqueror built the Tower of London to protect himself from_____ he had conquered .

　　A . those B . each other C . them D . it

　　50 . I probably know him _____ but not _____ .

　　A . by the sight …By name B . by a sight … by name

　　C . by sight … by name D . by the sight … by the name