根据句意，用所给单词的适当形式填空。
1.To be a successful man doesn’t just mean to be a _________(wealth) man.
2. Five ________(twelve) of the population in this factory are women.
3.Everyone should make a contribution to ___________ (protect) the environment.
4.I think watching table tennis match is ___________(simple) a waste of time. Why not take a walk in the garden, dear?
5.What great problems they have __________( pronounce) the word correctly.