Đáp án: (Các hành động đã xảy nên sử dụng thì quá khứ đơn)
1. Mi sang and danced for the elderly at a nursing home.
2. Mark and his friends collected books and set up a community library.
3. Lan and Mai grew and donated vegetables to a primary school.
4. Minh and his friends gave food to young patients in a hospital.
5. Tom made and sent postcards to the elderly at Christmas.
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