B. 根据句意，用括号内所给单词的适当形式填空。
【小题1】Be friendly and you will make more friends and fewer ________ (enemy).
【小题2】It’s very important to teach young children about road ________ (safe).
【小题3】Bill Gates is one of the ________ (wealthy) man in the world.
【小题4】The ________ (miss) boy hasn’t been found yet.
【小题5】In 1989, Audrey made her final ______ (appear) in films.