题目内容：

根据句意，在横线上写出单词的正确形式。

1. It’s her grandfather’s _____________(ninety) birthday next week.

2.Would you like to work in the      ____ (south) cities in China?

3.Walking on the moon was once an __________(possible)task before the 1960s.However,the dream came true later on.

4. She tried her best but did ____________(bad) among all the members in the team.