Chance the sentences into the two other forms

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----- Nội dung dịch tự động từ ảnh -----
1. (+) Go Green protects the environment.
2. (?)
3. (?)
4. (+) Mary will take part in community service in Vietnam.
5. (?)
6. Students are going to donate books to children in flooded areas.
7. (?)
8. (+) You can do volunteer work with us now.
9. (-) Many people provided clothes and food for homeless people.
10. (+) She brought some old books for poor children.
11. (-) Children didn't have enough food to eat.
12. (+)
13. (?) Go Green has encouraged people to recycle rubbish.
14. (-)
15. (?) They have done volunteer work.
16. (-)
17. (?) Has Peter collected clothes for street kids for two years?
18. (-)
19. (?) Sick children have to stay in the hospital all day.