用所给单词的适当形式填空。

1. It is __________ (possible) for me to finish the work today. I need another day to do it.

2. This is our new classroom __________ (build). There are eighteen classrooms in it.

3. The famous __________ (science) Qian Suesen died of illness on October 31, 2009.

4. I __________ (think) he could come to my party, but now I know I was wrong.

5. No one taught me. I learnt it all by __________ (my).