X.
1. People in many countries speak English.
2. Our environment is polluted by chemical wastes.
3. The plan of recycling will be changed by the committee.
4. I was delighted to get the best results in the final exams.
5. It is not difficult to study Vietnamese.
6. Will the information be sent by the manager soon?
7. People recycle old car tires to make shoes and sandals.
8. I am very sad not to be able to join the school football team.
9. The machine will be showed to the public when it is finished.
10. Mr.Tan was very disappointed that his students lost the game.