2. Read and choose Sarah is making a vlog about "Green Life".


A.Good idea! And we should also unplug it.
B.I agree. And we should also recycle old clothes.
C.Great! And we can also recycle bottles and cans.
D.You're right. And we can also reuse our old books.

1)A 2)D

1. 第一组对话主题是节约用电，对方提出不看电视时关掉电视的节电方法，A选项提到的拔掉电视插头也是节电的相关做法，匹配语境。
2. 第二组对话主题是节约用纸，对方提出纸张双面使用的省纸方法，D选项提到的重复使用旧书也是节约用纸的相关做法，匹配语境。

3. Read and number
( 5 ) Right! We should always unplug our computers.
() Look at the poster! It says many resources are running out.
() Great! Let's help our Earth together.
() I agree. And we should also use air conditioners less.
() Oh no! What should we do to help?
() Well, we can use LED lighting.

从第一处空到最后一处空，依次填写：1、6、4、2、3

这是情景对话排序题，我们按照日常对话的逻辑梳理顺序：
1. 对话开篇先引出话题，“Look at the poster! It says many resources are running out.” 是整个对话的起始句；
2. 看到海报得知资源即将耗尽后，发出感叹并询问可以做什么来帮忙，对应句子“Oh no! What should we do to help?”；
3. 接着对方给出第一个节能的建议，对应句子“Well, we can use LED lighting.”；
4. 随后说话人表示赞同，并补充另一个节能方法，对应句子“I agree. And we should also use air conditioners less.”；
5. 题目已经给出第5句是补充赞同、提出要随手拔掉电脑插头的内容；
6. 最后对话收尾，发出共同保护地球的号召，对应句子“Great! Let's help our Earth together.”。