根据句意用括号内所给单词的适当形式填空。

1. The ice is as _______ as glass. (clear).

2. The sun _______ kisses the earth. (soft).

3. I sat in the garden and the _______ of the sun made me feel sleepy. (warm)

4. The classroom is usually very _______ after class. (noise)

5. Lucy has _______ hair. (gold)

6. The water running _______ under ice. (swift)