题目内容：

根据句意，写出括号内所给单词的适当形式。

1.The dresses ___________（they）are made of cotton， but they sell well because of the famous designer.

2.These are _________ (act) costumes. They are made for these beautiful ladies.

3.Recently the Forbes magazine conducted a survey to find out who is the _________ (wealth)

person in the world.

4.I once lived in _________ (centre) Chongqing. People like hot food a lot there.