1/ people must learn about keeping the environment (pollute) 2/ it was very of you to leave the medicine where the children could get it (care) 3/ polluter water can dob hảm to people's health (direct) 4/ he is going to all the bags (collection) 5/ we will make this beach clean and again (beauty) 6/ air and water can make people fall ill (pollute) 7/ a large number of people have made on how to protect the environment (suggest)
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