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7. Pictures of earth can be seen from the outer space.
8. The traffic system should be modernized by the government
9. Clothes have to be washed every day.
10. His new collection is going to be introduced by him this evening.
11. The correct answer can't be found out by the student.
12. The result of the examination will be informed by the school in two weeks.
13. All the windows have to be closed by the students after class every day.
14. The news might be broken.
15. The previous lessons should be checked by the teachers regularly.
16. Raw sewage used to be pumped by that factory into the sea.
17. The bill won't be paid by Jack.
18. That button mustn't be touched while the experiment is in progress.
19. Urgent actions should be taken to prevent diseases after the flood.
20. Natural resources must be saved for future use.