Ⅳ. Read and write. 读一读，用所给单词的正确形式填空。
wear do behind begin
On Sunday morning, March 12, we will 1. volunteer work on Tree Planting Day.
We will go to Green Lake Park 2. our school. We need to dig (挖) small holes (洞), put young trees in them and water the plants. It 3. at 9:30 and ends at about 11:30.
Please 4. a pair of gloves.
We need volunteers. Please join us.

1. do 2. behind 3. begins 4. wear

1. 空前will是一般将来时的助动词，后接动词原形，do volunteer work是固定搭配，意为“做志愿工作”，所以填do。
2. 此处需要介词表示方位，behind意为“在……后面”，句意为“我们要去我们学校后方的绿湖公园”，直接填behind即可。
3. 后半句and并列的谓语ends是一般现在时的第三人称单数形式，主语It是第三人称单数，谓语动词begin要变为第三人称单数形式begins，意为“开始”。
4. 该句是Please引导的祈使句，后接动词原形，wear a pair of gloves意为“戴一副手套”，所以填wear。

Ⅴ. Read and choose. Ms Li 打电话邀请 Mary 参加周末的环保行动。读一读，补全对话。
Ms Li: Good morning, Mary! This is Ms Li from Green Community.
Mary: Good morning, Ms Li!
Ms Li: We will do the volunteer work — “Green City” this weekend. 1.
Mary: Yes, I’d love to. What can I do there?
Ms Li: Wonderful! 2.
Mary: OK! I can sort the waste, too.
Ms Li: Perfect! 3.
Mary: Sure! I can do it well.
Ms Li: 4.
Mary: Wow, that sounds interesting.
Ms Li: Great! You will be a super volunteer!
A. First, we’ll pick up waste near the lake.
B. At last, we will make homes for the birds with sticks.
C. Then, we need to clean the benches.
D. Would you like to join us this Sunday?

1. D 2. A 3. C 4. B

1. 根据后文Mary的回答"Yes, I'd love to."可知，此处Ms Li是向Mary发出参加志愿活动的邀请，对应选项D。
2. 此处开始介绍志愿活动的第一项内容，用First开头说明首个安排，和后文提到的分类垃圾的内容衔接自然，对应选项A。
3. 介绍完第一项活动后，用Then衔接下一项志愿工作，符合活动先后顺序的逻辑，对应选项C。
4. 此处是介绍最后一项志愿活动，用At last收尾，对应选项B。