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.