根据句意和汉语注释，写出单词的正确形式。
China is ______ (富有)and more powerful than ever before.
Everyone is _____________(料想) to know the rules.
Ren Rong has devoted himself to cultural _________(对话) between China and West
The researchers hope their new ______(发现) can be used to make objects that are difficult or impossible to replace.