题目内容：

根据句意，写出括号内所给单词的适当形式。

1.Hainan Island is in the  ___________ (south) part of China.

2.When you come to our town， you can enjoy its ________ (beautiful) everywhere.

3.Nothing is ____________(possible) if you put heart into it.

4.When the police opened the door， they found the man __________(die).