Here are the suitable verbs to fill in the blanks:

**Exercise 3: Fill in each blank with a suitable verb**

1. **clean** the school yard
2. **donate** food and money
3. **plant** vegetables
4. **help** old people
5. **recycle** the litter
6. **recycle** plastic bottles
7. **develop** the project
8. **exchange** old clothes for books

**Exercise 4: Complete the sentences with the words from the box**

1. Nam often reads books to the **elderly**.
2. We **plant** lots of vegetables in the school garden.
3. He wants to build a house for the **homeless** people.
4. Mai likes **volunteering** activities such as planting trees and cleaning in the park.
5. Many old people live in the **nursing** home to be cared for.
6. My class is doing an interesting **project**.
7. I give **my blood once a year**.
8. At school, teachers also help students develop some **life skills**.
9. Last week, the **volunteers** gave food and drink to homeless people.

Feel free to ask if you need further assistance!