用括号内所给单词的适当形式填空。
1. We all know that France is a _______ (Europe) country.
2. "Excuse me, can I take this seat?" he said to the young woman _______. (polite)
3. At _______ (one) I didn't like him, but now I do.
4. The young man fell _______ (sleep) as soon as he lay down.
5. There are a lot of _______ (mouse) in the old house.
