it’s possible to give without expecting anything in return.是lesson的同位语，表示lesson的内容

【题目】It was a dreadfully cold and cloudy afternoon. I was on the bus with my children, aged four and two, heading home when it started to rain. I realized this would mean a wet walk home  【1】           the bus stop.

【2】  my house was merely two blocks away, it was not a pleasant walk with one small boy asleep in the pram (手推婴儿车), the other one in a raincoat and no umbrella for myself. A pick-up truck passed us on the road. I tried to thumb a ride but failed. My little boy woke up with a start and began to cry. I 【3】      (convince) that things might become worse and nobody would bother to help on such a terrible day.

A few minutes later,   【4】  truck drove by, but to my surprise, I saw it  【5】 (pull) back and the driver looking directly at us.

A young man put the window down. “Hey, here’s an umbrella for you, please take  【6】   .” He called out.

I stood there   【7】  (astonish), barely believing that the man  【8】  existence was unknown to me only moments ago, could be so  【9】  (consider). “Come on, give this to your mummy,” he said to my older son. I accepted the offer and expressed my gratitude to him.

This man might have needed the umbrella for himself later during the day but preferred to give it to me. It was a lesson to me   【10】  it’s possible to give without expecting anything in return.