Помогите пожалуйста задание 13.2

1.The fact that this question is important - it is clear to everyone.
2.I feel that I have a cold
3. My friends promise that will help me.
4. He just told us to leave from the audience
5. He said he was going to leave our city
6. The teacher said that all the students passed the exam
7. John explained why he was late
8. He has warned that late for dinner
9. The teacher asked whether the students are ready for tests
10. Will they come on time, it does not matter
11. Athletes need a lot of training, so that they could take part in the competition
12.You must be careful not to make mistakes