16. A. donate B. rubbish C. blood D. money
17. A. green B. trees C. collect D. plant
18. A. bank B. environment C. community D. neighbourhood
19. A. blood B. homework C. students D. tutors
20. A. elderly B. grandparents C. nursing home D. orphan
21. A. donate B. rubbish C. blood D. money
22. A. green B. trees C. collect D. plant
23. A. bank B. environment C. community