1. 运用本单元“环境保护”主题词汇、定语从句（that/which）句型，描述身边的环境问

参考示例：
Now there are many serious environmental problems around us. The river that runs through our town is very dirty now, because lots of waste water which is produced by the nearby paper factory is poured into it every day. Many people throw away plastic bags and disposable chopsticks which are difficult to break up casually, and the rubbish that piles up at the street corner always gives out terrible smell. The haze that often appears in winter makes lots of kids and old people get ill easily. We all should take action to solve these problems to protect our environment.

【分析】
本题要求结合“环境保护”主题词汇与定语从句（that/which）句型，描述身边的环境问题。解题思路：1. 选取身边典型环境问题（如河流污染、塑料垃圾、雾霾等）；2. 用定语从句（that/which）修饰相关名词，丰富句子结构；3. 紧扣主题词汇准确表达问题，可适当加入环保呼吁内容，使表达完整。
【解析】
首先确定身边常见环境问题，如流经城镇的河流污染、难以降解的塑料垃圾、冬季雾霾等；接着用定语从句（that/which）对问题相关事物进行修饰，如“the river that runs through our town”“plastic bags which are difficult to break up”等；再结合环境保护主题词汇（如waste water、disposable chopsticks、haze等）准确描述问题，最后加入呼吁行动的内容，完成写作。
【答案】
Now there are many serious environmental problems around us. The river that runs through our town is very dirty now, because lots of waste water which is produced by the nearby paper factory is poured into it every day. Many people throw away plastic bags and disposable chopsticks which are difficult to break up casually, and the rubbish that piles up at the street corner always gives out terrible smell. The haze that often appears in winter makes lots of kids and old people get ill easily. We all should take action to solve these problems to protect our environment.
【知识点】
定语从句（that/which）、环境保护主题词汇运用、英语写作
【点评】
本题考查定语从句的语法运用与环境保护主题的英语写作，要求学生结合语法知识和主题词汇，准确描述身边环境问题，同时渗透环保意识，是语法与主题结合的典型写作题。
【难度系数】
0.5