用所给单词的适当形式完成句子。

1. It's _____  (fool) of him to believe the hoax.

2. According to his _____ (describe), the police caught the criminal two days after the murder,

3. Children like stories with happy _____ (end).

4. Lots of  _____ (leaf) on the tree have fallen into the river nearby.

5. I was in the _____ (embarrass) position of having completely forgotten her name.