4 Running a mile a day is a good exercise 

5 Go swimming in the river in the summer is interesting

6 Being is a great pleasure with you.

7 It is happiness to live with my family to me

8 Talking in the class while the teacher is explaining the lesson isn't good 

9 It is a her habit of complaining all day

10 It's very good  to play football

11 Paticipating in school activities is interesting

12 It is neccessary to recycle paper and cans

13 Climbing high mountain alone in the winter is unsafe

14 It is a good activity of helping poor children 

4. Running a mile a day is good exercise 5. Going swimming in the river in the summer is interesting 6. To be with you is great pleasure. 7. It is always happiness for me to live with my family 8. Talking in the class while the teacher is explaining the lesson is not good 10. It is good for your health to play football 11. Partcipating in school activities is interesting 12. It is neccesary to recycle paper and cans 13. Climbing high mountains alone in the winter isn't safe 14. It is a good activities of helping poor children