giải thích vì sao chọn từ đó luôn nha ----- Nội dung dịch tự động từ ảnh ----- 1. We must learn about keeping the environment (pollute) 2. We are worried about the here. (pollute) 3. The exhaust fumes are our cities.( pollute) 4. The river has been with toxic waste from local factories. (pollute)
