1 . 用方框中所给单词的适当形式填空。每词限用一次。

complain               contribution          remote          rescuer            lay

1. The hen hid itself behind a big rock to ________ egg.
2. The postman comes to this ________ village only once a week.
3. Everyone should make a ________ to protecting the environment.
4. Rose often ________ that the products in this store are too expensive.
5. After the earthquake, lots of ________ arrived at the area as soon as possible.