People have used the Internet all over the world

16. People have used the Internet all over the world.

-> The Internet ___________________________

17. We planted many trees in the school garden.

-> Many trees _________________________________

18. Someone has taken my book away.

-> My book ___________________________________

19. He didn't help me with my homework.

-> I ___________________________________________

20. We have learnt English for three years.

-> English ______________________________________