题目内容：

根据句意和汉语注释，写出单词的正确形式。

1.We hope you can ___________ (接受) our invitation and join us.

2.Now the Chinese ____________ (政府) has made laws to prevent all these things in Zhalong.

3.He had a ___________ (头痛) yesterday and wasn’t at school.

4.The __________ (突然的) heavy rain causes a lot of problem.