九年级英语-unit13--单元写作小专题3页.doc

单元写作小专题&Section B(3a3b)【单元写作目标】 能描述地球的环境问题、原因及解决问题的建议。 1. 能用“used to，at present，however”等词来描述当今的环境变化； 2. 能用 “I think we should /I suggest that /Wed better/We could/Its a good idea to”等句型来提出解决环境问题的建议。一、语言积累(一) Environmental problems and reasons:根据句意及汉语提示完成下列句子。1. The river used to be clean，but now the _ (底部)of the river is _ (充满 着)of _ (垃圾).2. People are _ (乱扔)rubbish in the river and factories are _ (倒入)waste water into