The first time I remember noticing I remember noticing the crossing guard was when he waved to me as I drove my son to school. He 16 me with a puzzle ---- all because he waved to me like someone does 17 seeing a close friend. A big, 18 smile acpanied his wave. For the next few days I tried to 19 his face to see if I knew him. I didn’t. Perhaps he had 20 me for someone else. By the time I contented myself with the 21 that he and I were strangers, we were greeting each other warmly every morning like old friends.
Then one day the 22 was solved. As I 23 the school he was standing in the middle of the road 24 his stop sign. I was in live behind four cars. 25 the kids had reached the safety of the sidewalk, he lowered his sign and let the cars 26. To the first he waved and 27 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 28 from the crossing guard, and the driver, a stiff-looking（表情刻板的） businessman, gave a brief, almost 29 wave back. Each following car of kids on their way to school 30 more heartily.
Every morning I continued to watch the man with 31. So far I haven’t seen anyone 32 to wave back. I find it interesting that one person can make such a（n） 33 to so many people’s lives by doing one simple thing like waving and smiling warmly. His 34 armed the start of my day. With a friendly wave and smiling face he had changed the 35 of the whole neighbourhood.
16. A. hit B. disappointed C. presented D. bored
17. A. on B. from C. during D. about
18. A. false B. shy C. apologetic D. bright
19. A. research B. study C. recognize D. explore
20. A. praised B. blamed C. mistaken D. respected
21. A. conclusion B. description C. evaluation D. introduction
22. A. argument B. disagreement C. mystery D. task
23. A. visited B. approached C. passed D. left
24. A. drawing back B. putting on C. handing in D. holding out
25. A. Once B. Before C. Unless D. While
26. A. in B. through C. out D. down
27. A. cried B. cheered C. smiled D. gestured
28. A. idea B. reply C. notice D. greeting
29. A. awkward B. angry C. elegant D. patient
30. A. came B. responded C. hurried D. appeared
31. A. surprise B. frustration C. interest D. doubt
32. A. fail B. try C. wish D. bother
33. A. offer B. sacrifice C. promise D. difference
34. A. effectiveness B. cheerfulness C. carefulness D. seriousness
35. A. trends B. observations C. regulations D. feelings16-20 CADBC 21-25 ACBDA 26-30 BCDAB 31-35 CADBD
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(答案→)16-20 CADBC 21-25 ACBDA 26-30 BCDAB 31-35 CADBD
解析：
16. 考查动词。根据下文，“he and I were strangers”，但是“he waved to me like someone does on seeing a close friend，”所以这不合常理，“present（呈现，呈送）me with a puzzle”。
17. 考查介词。根据常识，人们一见到亲密朋友就会挥手问候，on doing sth. “一……就”，故选“on”。
18. 考查形容词。和上文 a close friend 相照应，人们见到朋友会呈现“灿烂的”笑容，故选bright“欢快的，兴高采烈的，灿烂的”。
19. 考查动词。因为作者不认识他，所以作者想努力观察他的脸以确定是否认识他。study “仔细端详，仔细察看，研究”。
20. 考查动词短语。 the crossing guard的热情与陌生人的身份不符，所以作者认为他是误把自己当成了别人。
21. 考查名词。作者虽然不理解，但还是高兴地接受了这一“结果”conclusion “结论，结果”， description “描述”，evaluation “评估，评价”，introduction“介绍，引言”。
22. 考查名词。作者之前只能猜想，认为是神秘的事。本题可用排除法，文中不存在argument（争论、辩论），也没有意见上的分歧（disagreement），也不是任务（task）。
23. 考查动词。 根据下文Each following car of kids on their way to school 30，可知是作者送儿子前往学校的路上。approach “靠近，接近”。
24. 考查动词短语。 根据常识，交警指挥交通会举出他的标志牌。draw back “撤退，撤回”， put on “穿上”， hand in “上交”， hold out“伸出，拿出，举出”。
25. 考查连词。他放下标志牌的前提是孩子们到达马路的安全区域，所以选once 引导条件状语从句。
26. 考查介词。车辆是从马路中间穿过，只有through 有此意。
27. 考查动词。 和上文A big, 18 smile acpanied his wave 相照应。
28. 考查名词。向别人微笑和挥手都是一种问候。
29. 考查形容词。 根据上文对businessman 的描述 stiff-looking(表情刻板的), 所以他的挥手是awkward “笨拙的，不灵活的”，elegant“优雅的”，patient “耐心的”。
30. 考查动词。后面的车辆对交警的“反应”更加开心快乐。本题heartily 是副词，故排除A、D， 再根据题意排除C。
31. 考查名词。作者对其产生了好感，故会以感兴趣的眼光来观察他。
32. 考查动词。 此句是双重否定，作者没见到任何不向这个交警回以挥手的人。前已有否定词，只有A选项表否定，fail to do sth.“未能做某事”。
33. 考查名词在固定短语中的意思辨析。 “make a difference” means “to have an important effect on a thing or a situation”(有影响，使不同)。sacrifice（牺牲）不合题意。
34. 考查名词。 effectiveness “有效性”，cheerfulness “快乐，开朗，欣然热情”， carefulness“细心”，seriousness“严肃”。
35. 考查名词和动词搭配。他改变了邻里之间的“感情”，本题考查动宾搭配，其他三项都不能做“改变”的宾语。