помогите пожалуйстаEach sentence contains a mistake. Find the mistake and rewrite

Помогите пожалуйста
Each sentence contains a mistake. Find the mistake and rewrite the sentence correctly
1 the teacher and the students going to go on an excursion
2 What do you do tomorrow
3 They say its raning next week
4The Prime Minister will make a decision today
5 I cant meet you tomorrow because ill do an exam
6 If scientists dont find a solution fot this problem , the planet gets much hotter
7 I may definitely arrive at the station at six o"clock