生成十句英文随机句子，字数在10到20之间。
1. The purple unicorn danced gracefully in the moonlight.
2. He never expected to find the missing key under the couch.
3. The old oak tree swayed in the gentle breeze.
4. She sipped her coffee and watched the sunrise over the mountains.
5. The stray cat meowed loudly outside her bedroom window.
6. The sound of rain on the tin roof was soothing and relaxing.
7. The children giggled as they chased each other through the park.
8. The smell of freshly baked bread filled the kitchen.
9. The train whistle echoed through the empty streets.
10. The book he was reading suddenly came to life before his eyes.