làm giúp mình nhé III. Decide whether the following sentences are Correct or Incorrect in terms of grammar.1. Have you ever worked as a volunteer?2. Last year I have donated my old clothes to children in Lao Cai.3. I have cleaned up my room last week.4. I have stayed in San Francisco for two years.5. Did she never used public transport?6. Last month, we started a community garden project.7. Yesterday, I've gone to the nursing home to visit my grandfather.8. She hasn't finished her work yet.9. Hey Tom! Did you cook a meal at a shelter for homeless people last week?10. They raised 20 million dong for the fund so far.11. Have you ever planted trees in public areas?12. Minh likes doing exercise in the morning, but he also likes walking to school.13. Quan has a terrible toothache, so he doesn't want to see a dentist. 14. To prevent your eyes from getting dry, remember to use eye-drops when you return from a dusty area.15. Did she given away warm clothes to homeless people last week?16. I was so excited when I read that book yesterday.17. People in the countryside are under less stress, so they live longer.18. We got up early and pick up litter around BlakeLake last Sunday.19. Yesterday, I've donated blood in Bach Mai hospital.20. Doing more exercise is very important; it helps you keep fit