根据句意和汉语注释，写出单词的正确形式。
小题1:Guangdong is in the __________________ (north) part of the city
小题2:She danced so ______________ (beauty) that everyone clapped their hands.
小题3:Look! Their __________ (wife) are waving to them
小题4:Do you think noise _____________(pollute) is a terrible problem?
