单词拼写 。

1. Many children s_______ to death every year in Africa because of the lack of food.

2. Without the teacher's p_______, you cannot play with the computer in our class.

3. Wu must keep the b_______ of nature.

4. We don't have the p_______ to hear such an empty talk.

5. Don't be r______ to your friends. You should be friendly to each other.

6. As is known to all, smoking is h_______ to our health.