51. We must pay special attention to the idioms of ____ English language.

　　 A. the　　　　　　　　　 　　 B. some　　　 　　　　　　 C. an　　　　　 　　　　　　　　　 D. /

50. Things of ____ kind come together; people of a mind fall into ____ same group.

　　 A. a; a　　　　 　　 B. a; the　　 　　　　　 C. the; the　　　 D. the; a

49. I don’t know who invented ____ telescope, but I think it is ____ most useful invention.

　　 A. the; the 　　 B. the; a　　 　　　　　　 C. a; the　　　 　　　　 D. a; a

48. According to the recent reports, one of the rare animals, ____ crocodile, is in ____ danger of dying out.

　　 A. the; the 　　　　 B. the; /　　　　　　　 C. / ; /　　　 　 D. / ; the

47. The soldier was wounded in ____, but he caught the enemy officer by____.

　　 A. the knee; the arm　　　　　　 B. his knee; his arm

　　 C. his knee; the arm　　　　　　 D. the knee; his arm

46. When we study a globe, we can see ____ is the　largest ocean and ____ the largest continent.

　　 A. the Pacific; Asia　　　　　　　 B. Pacific; the Asia　　　　　　

　　 C. the Pacific; the Asia　　　　 D. Pacific; Asia

45. - Who is your English teacher?

　　 - Mr. White, ____ European working in ____ Nanjing University.

　　 A. an; the　　　　　　 　　　　 B. a; the　　　　　　 C. an; /　　　　　　　 D. a; /　

44. I didn’t tell him____ news at once because I wanted to give him ____ surprise.

　　 A. a; a　　　　 B. the; the　　　　 C. the; a　　　　　　 D. / ; the

43. You can have ____ second try if you fail ____ first time.

　　 A. the; /　　 B. / ; a　　　　　　　　 C. the; a　　　　　 D. a; the

42. John spent too much time talking on ____ phone while we were all busy at ____ work.

　 　A. the; /　　 B. a; /　　　　　　　　　 C. / ; /　　　　　　　 D. the; the