阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

　　The first time I remember noticing the crossing guard was when he waved to me as I drove my son to school. He 　41　 me with a puzzle-- — all because he waved to me like someone does 　42　 seeing a close friend. A big, 　43　 smile accompanied his wave. For the next few days I tried to 　44　 his face to see if I knew him. I didn’t. Perhaps he had 　45　 me for someone else. By the time I contented myself with the 　46　 that he and I were strangers, we were greeting each other warmly every morning like old friends.

　　Then one day the 　47　 was solved. As I 　48　 the school he was standing in the middle of the road 　49　 his stop sign. I was in line behind four cars. 　50　 the kids had reached the safety of the sidewalk, he lowered his sign and let the cars 　51　. To the first he waved and 　52　 in just the same way he had done to me over the last few days. The kids already had the window down and were happily waving their reply. The second car got the same 　53　 from the crossing guard, and the driver, a stiff-looking(表情刻板的) businessman, gave a brief, almost 　54　 wave back. Each following car of kids on their way to school 　55　 more heartily.

Every morning I continued to watch the man with 　56　. So far I haven’t seen anyone 　57　 to wave back. I find it interesting that one person can make such a(n) 　58　 to so many people’s lives by doing one simple thing like waving and smiling warmly. His 　59　 armed the start of my day. With a friendly wave and smiling face he had changed the 　60　 of the whole neighborhood.

41．A．hit 　　　　　　B．disappointed 　　　　　C．presented 　　　　　　D．bored

42．A．on 　　　　　　 B．from　　　　　　　　　 C．during 　　　　　　　 D．about

43．A．false 　　　　　B．shy　　　　　　　　　　C．apologetic 　　　　　 D．bright

44．A．research 　　　 B．study 　　　　　　　　 C．recognize　　　　　　 D．explore

45．A．praised 　　　　B．blamed 　　　　　　　　C．mistaken 　　　　　　 D．respected

46．A．conclusion　　　B．description 　　　　　 C．evaluation　　　　　　D．introduction

47．A．argument 　　　 B．disagreement　　　　　 C．mystery　　　　　　　 D．task

48．A．visited 　　　　B．approached 　　　　　　C．passed　　　　　　　　D．left

49．A．drawing back　　B．putting on 　　　　　　C．handing in 　　　　　 D．holding out

50．A．Once 　　　　　 B．Before　　　　　　　　 C．Unless　　　　　　　　D．While

51．A．in 　　　　　　 B．through　　　　　　　　C．out　　　　　　　　　 D．down

52．A．cried　　　　　 B．cheered　　　　　　　　C．smiled　　　　　　　　D．gestured

53．A．idea 　　　　　 B．reply　　　　　　　　　C．notice　　　　　　　　D．greeting

54．A．awkward 　　　　B．angry　　　　　　　　　C．elegant 　　　　　　　D．patient

55．A．came　　　　　　B．responded　　　　　　　C．hurried 　　　　　　　D．appeared

56．A．surprise　　　　B．inspiration　　　　　　C．interest　　　　　　　D．doubt

57．A．fail 　　　　　 B．try 　　　　　　　　　 C．wish 　　　　　　　　 D．bother

58．A．offer　　　　　 B．sacrifice　　　　　　　C．promise 　　　　　　　D．difference

59．A．effectiveness　 B．cheerfulness 　　　　　C．carefulness　　　　　 D．seriousness

60．A．trends 　　　　 B．observations　　　　　 C．regulations 　　　　　D．feelings