根据汉语或首字母提示，在下列句子中写出单词的正确形式。
1．Her mother ______( 提示)what we should do first bfore we began.
2. The beauty of Xihu is beyond _______(描述).
3. You must obey the ______(命令)-you are a soldier.
4. As the natural _____(资源) are running out, we must make full use of them.
5. The Great Wall was our final d______(目的地).
6. Although we were very busy, we accepted the i_____ to the wedding.
7.Rice is the s_____ food in many Asian countries.
8.We make ourselves understood not just by words but also by g____ language.
9. He decided to a a useful method to improve his English.
10.S_______ travels more slowly than light.