The first time I remember noticing the crossing guard was wh
The first time I remember noticing the crossing guard was when he waved to me as I drove
my son to school.He__1__me with a puzzle-all because he waved to me like someone does
__2__ seeing a close friend.A big,__3__smile accompanied his wave.For the next few days
I tried to__4__his face to see if I knew him.I didn't.Perhaps he had__5__me for someone else.
By the time I contented myself with the__6__that he and I were strangers,we were greeting
each other warmly every morning like old friends.
( )2.A.on B.from C.during D.about
( )4.A.study B.recognize
为什么2题选a,详细分析每个选项
4题为什么选a,不选b,ab有什么区别