一、根据中文提示补全句子。
1. Don't (扔掉瓶子). It's bad for the Earth.
2. We can (回收利用塑料杯子和瓶子) to make new things.
3. We (用旧物品做一个艺术项目) in art class.
4. We should (把垃圾分类) every day.
5. This beautiful cup (用玻璃做成).

1. throw away bottles 2. recycle plastic cups and bottles 3. do an art project with old things 4. sort rubbish 5. is made of glass

二、按要求完成句子。
1. It is a great DIY work with old things.（改为感叹句）
DIY work with old things it is!
2. We made tables and chairs with wood.（改为一般疑问句）
tables and chairs with wood?
3. Helen did a project with old things last week.（改为否定句）
Helen a project with old things last week.
4. We should save energy because energy is limited.（对画线部分提问）
you save energy?
5. I will make some paper flowers with the waste paper.（对画线部分提问）
What will you the waste paper?

1. What a great 2. Did you make 3. didn't do 4. Why should 5. do with

三、完形填空。
Dear friends，
Do you want a green life? Let's start with 1 things. Every day, we use many things—milk cartons, plastic bags, paper and more. But most of us throw them away after using once. That's not good 2 the Earth.
Milk cartons are 3. They have three parts: paper, plastic and metal. We can recycle them in three steps. First, open the carton and wash it. Then press it to make it flat. Finally, put it into the 4 recycling box. After that, the carton will turn into new things—new paper, new bottles or new cans.
5 isn't hard. It's like magic. Let's do it together for our earth!
()1. A. clever B. big C. small
()2. A. for B. with C. on
()3. A. useful B. clever C. difficult
()4. A. black B. red C. blue
()5. A. Reusing B. Recycling C. Reducing

1. C 2. A 解析：be good for ... 对……有益。 3. A 解析：牛奶盒是有用的。 4. C 解析：蓝色垃圾桶通常是放可回收物。 5. B