The Vietnam(越南) War broke out. The young husband 1the army and died in the war. His wife and son began to have a 2life after that. Even though their life was very hard and sometimes they didn't have enough food to eat, the 3still decided to raise her son by herself.

  Several years later her son immigrated(移民) to America 4finally become an engineer. He often sent letters to his mother with much money. However, with many excuses, the son 5to come back home to visit his mother.

  6his mother died, the son returned. But he didn't cry. His mother left a box behind. During the funeral(葬礼), the son opened the box and 7cried and shouted, "Mom! Mom!"8looked at each other and then looked at the box. It was full of $ 100 bill and a piece of paper.

  It read, "Son, I don't spend too much money. I miss you a lot. Every time I heard a motorcycle 9. I ran out of the door but it wasn't you. I stayed money 10you in case (以防) you get sick."