Unit 2 Saving the Earth Topic 3 Would you like to be a greener person? Section A 1. Learn some new words and phrases: reduce, plastic, can, suppose, be suppose to do, nod, agreement, shake, ought to 2. Learn a useful sentence: Everyone is supposed to do so. Teaching aims and demands 3. Learn the compound sentences with “or”, “and”, “but” and “while”: (1) Noise is a kind of pollution and its harmful to our hearing. (2) The earth is beautiful but people hurt the earth now. (3) Work hard, or you wi
