用括号中所给的词的适当形式填空。

1. The farmers in the village live a happy and ________ (health) life.

2. It's ________ (usual) for him to come back home late because he always arrives home before his parents.

3. All the drivers have to drive slowly and carefully because of the ________ (fog) weather.

4. Timmy was ________ (trap) under the stones and bricks, so he shouted for help.

5. We must do something to protect these ________ (danger) birds.