The first time I remember noticing the crossing guard was when he waved to me as I drove my son to s

我记得我第一次注意到十字路口的守卫,是当我开车送我的儿子去…时,他向我招手.The first time 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 accompanied his wave. For the next few days I tried to__19___his face to see if I knew him. I didn’t.选项给我16. A. hitB. disappointedC. presentedD. bored 17. A. onB. fromC. duringD. about 18. A. falseB. shyC. apologeticD. bright 19. A. researchB. studyC. recognizeD. exploreCADC