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第二节完形填空（共20小题；每小题1分，满分20分）请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中
Teaching second grade is always a challenge. Each student arrives at school with his own needs and difficulties. One year，a student called Billy   31   me with his behavior as well as his academic requirements. He struggled daily with his   32   emotions and often became angry or violent. I knew that, to make   33    progress, his emotions needed controlling. 
One   34   I tried to help Billy was to have him come directly into the classroom when he arrived at school. Billy’s mom would   35   me to alert (警告) me to a particularly emotional morning at home. Then, I would focus on   36   his anger and calming him down before the other students arrived.
One week our class was studying   37  . I thought one way to bring learning into the classroom was to bring my dog Rocky to school for the day.
That day began as normal. I was preparing activities focused on dog themes   38   I was told that Billy had a   39   morning at home and I might need to get him   40  . As I was talking to his mom, Billy   41   into the classroom. To Billy’s   42  , Rocky immediately ran up to his new   43  , wagging his tail and licking Billy’s face with doggy affection. Billy couldn’t   44   Rocky’s charm (魅力) and began laughing as his anger melted away.
Throughout the day, Billy never left Rocky’s side, feeding him, being gentle with him and even   45   the other students while Rocky was sleeping.
Billy was known for doing anything he could to avoid   46  , but on this day he found a good dog story, “Clifford’s Puppy Days,” and read it to Rocky. How   47   I was at the sight of Billy reading happily！My little dog was able to   48   Billy’s day from one of anger and frustration to one of laughter, gentleness and   49  .
That day Rocky more than helped me with my   50  ; he helped to change the life of a child! After that Billy’s behavior definitely improved.
31. A. challenged   B. cheated         C. benefited       D. betrayed  
32. A. unforgettable B. uncontrollable  C. unconscious       D. unfortunate   
33. A. physical    B. mental              C. academic       D. authentic 
34. A. advantage    B. agenda              C. reason         D. way
35. A. awake      B. call           C. visit           D. sign
36. A. tolerating     B. observing      C. relieving       D. ignoring
37. A. emotions      B. pets           C. botany        D. diet   
38. A. after       B. as              C. when         D. before
39. A. boring     B. fantastic        C. busy          D. rough
40. A. settled     B. punished       C. treated              D. excited
41. A. fled         B. stormed         C. jogged              D. floated
42. A. surprise          B. delight              C. shame         D. fear
43. A. protector      B. trainer         C. friend         D. owner
44. A. resist       B. describe        C. reduce         D. forget
45. A. educating    B. envying         C. comforting     D. quieting
46. A. exploding    B. reading         C. arguing        D. apologizing
47. A. surprised      B. disappointed      C. amused         D. confused
48. A. urge        B. shorten         C. transform      D. expand
49. A. admiration B. curiosity        C. anxiety       D. love
50. A. family     B. teaching       C. housework      D. performance