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disagreement. while We should plant more trees or there will be more desert. What’s the usage of conjunctions? or , and, but or while or 否則的話,表選擇關系。 Teachers __________know a lot. are supposed to Act out 1a in pairs. Look at the following pictures and sort the garbage the way you do every day. paper cups glass bottles cans newspapers plastic bags paper bags Reduced Recycled Reused Then listen to the conversation carefully and check (√) your answers. Type of garbage Recycled Reused Reduced plastic bags √ paper cups cans newspapers glass bottles √ √ √ √ (錄音) Ⅰ .Conjunctions: and , but, or, while. Ⅱ .Language points: for 為 ……工作 sb. to do sth. 鼓勵某人去做某事 is/was + adj.+ of/for sb. +to do sth. supposed to do sth. hard, ____you will fail the exam. B. but C. or D. while √ should encourage students _____ the environment.