The bell rang loudly.Everybody packed their school bags and got ready 1 home.When the teacher dismissed the children，they lined up in two rows and walked 2 to the school gate.
Usually，George’s 3  would fetch him home from school.But today she was not there.George waited for fifteen minutes 4 he walked home.
When he reached home，he knocked at the door as he did not bring his keys.Surprisingly，no one opened the door.George 5  his mother was in the toilet，so he waited for his mother.After a few minutes there was 6  no answer.Just as he was about to go to the nearby coffee shop where his father worked to 7  the keys，he heard the friendly voice of his neighbor，John.
George told John that no one was at home and John?s mother suggested that George could stay in their house till his mother came back.George and John played happily till evening when George’s mother came back.George 8 John and his family before he went back into his house.His mother told him that she had a backache and she had to see a doctor. 9 this experience，George learnt an important 10，“Neighbors are people who help each other.”

I heard a story about a famous scientist who had made several very important achievements.
What made him   41  from others?
He said it all came from   42  that happened when he was two years old. He tried to  43 
a bottle of milk away from the fridge, but the slippery(光滑的) bottle fell, spilling its milk all over the   44  floor.
When his mother came in,  45  shouting at him, she said, “Robert, what a great mess(一团糟) you have made! I have never seen such a big puddle(水坑) of milk. Would you like to get down and play in the milk for a few minutes   46  we clean it up?”
Indeed, he did. After a few minutes, his mother said, “Robert, when you make a mess like this, you have to clean it up at last. So,   47  would you like to do that? We would use a towel or a mop. Which do you prefer?” He chose the towel and together they cleaned up the milk.
His mother then said, “We had a failed   48  in how to carry a big milk bottle with two small hands in the kitchen. Let’s go out and fill the bottle with water and see if you can   49  a way to carry it without dropping it.” The little boy learned that if he held the bottle at the top near the lip(杯口) with both hands, he could carry it without dropping it.
This scientist then said that it was at that moment that he knew he didn’t need to be afraid to
  50 .So, what have you learnt from the story?