根据汉语提示写出单词。
1. Last Wednesday, our teacher told us to write an (文章) about Christmas.
2. —Would you like to be a (社会的) worker when you grow up?
—Yes, I'd like to help people solve their problems.
3. In the wetlands, birds can (不费力地) catch some fish for food.
4. It's her first time to leave home alone for such a long time, so she her parents very much.
5. Many people still don't know the importance of (keep something or somebody safe from danger) wildlife.
