1. Because of being ill , Mary doesn't go to school

2. Because of the rain was heavy, our guest arrived late

3. Because my friend is absent , I have to copy..

4. Because of this boy's laziness, he is ignorant

5. Because my friend was ill, he was absent

6. Because of his bad behaviour, he must be punished

7. It rained heavily so they got wet

8. Because I didn't have enough money , I didn't buy .. 

9. Because of being careless, Tom lost his job

Exercise II : 

1. stay

2. to tell

3. spending

4. helping

5. learning

6. calling

7. typing

8. helped

9. hoping/praying

10. meeting

11. to resign

12. breaking

13. to have

14. to meet

15. not to tell

16. holding

17. hoping to win

18. walking

19. listening

20. not to make

21. giving

22. writing

23. trying to catch

24. to pay

25. answering

26. to forget /worrying

27. to pay

28. using/working

29. hearing/not to enter

30. to have/ to get