根据句义，用括号内所给词的适当形式填空。

1. Lucy usually enjoys ______ (she) in front of the mirror before leaving home.

2. "Why are you late for school again?" said his teacher ______ (angry).

3. My uncle lives on the ______ (twelve) floor of the building.

4. We all received an ______ (invite) to her wedding.

5. You can go ______ (cross) the street when the traffic lights turn green.