根据句意用所给词的正确形式填空。

1. He thought carefully before _____ (reply).

2. The police are stopping cars and checking the drivers' _____ (license).

3. All the _____ (member) of the family get together to enjoy the holiday.

4. The children have never been _____ (teach) French.

5. He tried over and over and finally _____ (succeed).