一道英语短文改错题Last Sunday morning when I got up,to me great surpr

一道英语短文改错题
Last Sunday morning when I got up,to me great surprise, 1.________
I found that we had a big snowfall. I was very excited because 2.________
it was a long time that I had ever seen such a heavy snowfall. 3.________
So I decided to call my friends to go out to play snow together. 4.________
We made up some snowmen and rolled some snowballs 5.________
and we enjoyed the fun of playing fighting games.Just then 6.________
we noticed that the buses and cars move very slowly 7.________
because the heavy snow.So we went to clean the snow so as to 8.________
help the traffic go safely.After the all morning's hard work. 9.________
we cleaned the snows on the road,and we went home happily. 10.________