阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为l6-25的相应位置上。
It was a 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     the bus stop.
Home was only two blocks away    it was not a pleasant walk with one small boy fast 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 and, a few minutes later, I saw it     (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 it.” He called out.
I stood there    (astonish), barely believing that the man,     existence was unknown to me only moments ago, could be so    (thought). “Come on, give this to your mummy,” he said to my older son. I gratefully accepted the offer,    (thank) him and watched the truck disappear down the road.
This man might have needed the umbrella for    later during the day but preferred to give it to me. It was a lesson to me    it’s possible to give without expecting anything    return.