用所给单词的适当形式填空。

1. There was an _________ (argue) happened between Tom and Jack last night.

2. Lucy is used to_________ (have) a walk after supper every day.

3. The people in Iraq keep fighting for their own ________ (free).

4. The teenagers have to work hard because of the _________ (press) from their parents.

5. They tried their best to find the ______ (solve) because they want to solve the problems.