When Mary was a student she always wanted to be a teacher because she liked children．When she was twenty-one years old,she began teaching in a small school．She was a good teacher and laughed a lot with the children in her class．They liked her teaching．One day,one of the girls in her class said to her,“Mary,why does a man's hair become grey before the mustache?” Mary laughed and answered,“I don't know,Helen．Do you know why it becomes grey before the mustache?” “I don't know,either,” answered Helen．“But it happened to my father．”
Then one of the boys said,“I know,Helen．Men's hair becomes grey first because it is sixteen years older than their mustache．”
根据短文内容，填入所缺单词。
Mary wanted to 1 a teacher when she was very 2 ．She 3 a teacher at the 4 of twenty-one．She 5 well and the children 6 her very much．One day 7 asked her a hard question．She wanted to know why 8 hair became grey before their mustache．It was hard for Mary to answer．But a boy could．He thought a man's hair became grey first just 9 a man 10 have mustache when he was young enough．
Vanilla is my best friend．She is a lovely girl with two big,beautiful eyes．But she always hides them 1 a pair of black glasses．
One day,however,I 2 ended our friendship．I remember that day clearly．We were 3 in the classroom．The teacher was giving us our results of a Chinese exam．I had done badly．I felt so 4 that I wouldn't talk to anyone．At lunchtime,I even stayed in the classroom alone．Suddenly,I heard a 5 ．It was Vanilla．“You look very unhappy,” she said．“What's wrong?” I looked at her for a while,but said 6 ．I knew Vanilla had got a good mark(分数) in the exam．I thought she was 7 me．I sat silently,but Vanilla didn't go away,she 8 asking me questions：“Is it because of the exam? Do you want me to tell you the right 9 ?” I looked away from her．When I looked up again,Vanilla had gone．And so had my exam paper! I didn't know 10 to do．I looked for my paper everywhere,but couldn't find it．
In the afternoon,Vanilla came up to my desk and 11 me my exam paper back．I looked at it and got a big 12 ．Vanilla had written the right answers next to every one of my mistakes．How 13 she was! My face turned red．I wanted to hug her,but I only held her hands and said,“Thank you．” That afternoon, 14 Vanilla and I were on the way home,I felt quite happy and thanked her again．We are 15 best friends．
