----- Nội dung dịch tự động từ ảnh ----- Exercise 7. Fill in the blank with the correct prepositions.
1. My sister's _______________ 2. We donate books _______________ the Red Cross. 3. We can exchange dead batteries _______________ an orphanage every year. 4. Last month, we gave gifts _______________ children in my neighborhood. 5. My family grew vegetables _______________ old people. 6. That policeman is very kind. He is taking care _______________ thousands of homeless dogs. 7. I had a gap year, so I volunteered _______________ a primary school last spring. 8. Nancy and her friends are picking _______________ rubbish. 9. They turn old plastic bottles _______________ hundreds of pretty vases and toys. 10. We spend a day cleaning _______________ dirty streets every week.