单词拼写。
根据下列句子及所给汉语注释，写出空缺处各单词的正确形式。（每空只写一词）
1. My _____(本国的)language is Chinese.
2. He went through the forest under the ______(保护)of his dog.
3. There are seven _____ (大洲) on the earth.
4. She is ______(挑剔) about what she eats.
5. The patient was lying on the floor _____(失去知觉).
6. Some fossil ______(燃料)result in increase in carbon dioxide.
7. I was feeling ______ (不舒服) hot.
8. He has gained ______ (实践的) experience of sailing as a sailor.
9. The ten most ______(频繁地) asked questions are listed below.
10. Nowadays we still can see rivers p______ with chemical waste from factories.