Liu Ying and Li Lei are ctes. One Saturday afternoon they went to their neighbour Granny Yang to do some housework. Liu Ying ed to clean the windows and Li Lei ed to sweep the floor. After an hour's work, they finished cleaning.
Granny Yang was very gratel to them. He took out the apples and said，"Come and have an apple.”Liu Ying and Li Lei didn't take the apples but said，“No, thanks.”With these words, they left the Granny Yang's house. They felt a bit tired but very happy.
Granny Yang didn't know why. Liu Ying and Li Lei said, “We are learning from Lei Feng. We will come again next Saturday.”
注释:
1) after an hour's work一小时的工作后
2) be gratel to .感激某人
3) with these words说着这些话
4) feel a bit tired感到有些疲劳
