在下列各句的空白处填入一个最恰当的单词，使句子意思完整，语法正确。 1. On

问题：

在下列各句的空白处填入一个最恰当的单词，使句子意思完整，语法正确。

1. On the first day of school after winter vacation,  everybody felt _____ and wanted to sleep.

2. Bill, put away your clothes.  Your bedroom is really a _____.

3. Ijoined the Party in 2001.  That means I have been a _____ of Party for 9 years.

4. 1 wrote several letters to him,  but he didn't _____ to me.

5. The one who _____Wenchuan earthquake would remember the meaning of a life forever.