小博士：时间名词前可以用的介词在初中阶段学的主要有5个，可以用下面的速记歌来帮助学习。

　　年月之前要用“in”，遇到日期却用“on”。

　　上午下午又是“in”，某日上下午“on”帮忙。

　　正午、晚上用“at”，黎明、午夜也相宜。

　　时钟之前也是“它”，差分过秒不用“它”

　　说“差”要用介词“to”，说“过”要用“past”。

　　多说多练牢牢记，学好英语本事大。

记住了吗？那么就请信心十足地动手做下面的介词填空练习吗：

1　　My birthday is ________Dec. 1st.

2　　He was born ________ 1991.

3　　The People's Republic of China(中华人民共和国) was founded (成立) ________ October 1st 1949.

4　　It was happened(发生) ________ the morning of a cold day.

5　　－Do you have time ________ Sunday evening?

　　 －I'm afraid not. But I am free ________ the afternoon.

6　　I usually go to bed ________ 9:00, but ________ weekends, I'm later.

7　　New school year begins ________ September.

8　　You can get cheap things ________ this time of year.

9　　We enjoy ourselves ________ Children's Day.

A man got a new car and he was very proud 　26　 it. One day, when he 　27　 back home, he saw his three-year-old son 　28　 hitting the new car with a toy hammer. The man was 　29　 angry that he ran to his son, grabbed the hammer from 　30　, and used the hammer to hit the little boy’s hands too hard. The 　31　 boy cried out but his father didn’t care.
　　When the father 　32　, he took his son to the 　33　 as fast as he could. Although the doctor tried his best to save the 　34　 bones（骨头）, he had to cut the fingers from both of the boy’s hands in the end.
　　When the boy 　35　 in the hospital and saw his hands, he innocently(天真) said, “Dady, I’m sorry about your car.” Then he asked, “but 　36　 are my fingers going to grow back?” The father 　37　 very sad.
　　Think about the story when 　38　 steps on your feet or when you wish to take revenge(报复). Think first before you lose your patience with someone. Cars can 　39　, but broken bones and hurt feelings often can’t.
　　People often make mistakes. But we should remember that forgiveness is greater than revenge. 　40　 before act!