Today is March 12th. It’s Arbor Day — a day to plant trees. Our school has a tree-planting activity. My classmates and I go to the school yard. First, we dig holes with small shovels (铁锹). Then we put the small trees into the holes. We cover (覆盖) the roots with soil (土壤). After that, we water the trees. Our teacher helps us, too. We are all very happy. I hope the trees will grow tall and strong. What a great day!

1.1.When is Arbor Day?

A March 12th.

B May 1st.

C June 1st.

D

解析：选A。A细节理解题。根据第一段第一、二句 “Today is March 12th. It’s Arbor Day” 可知，植树节在 3 月 12 日。故选 A。

2.2.Where do we plant trees?

A In the zoo.

B In the school yard.

C In the park.

D

解析：选B。B细节理解题。根据文中的 “My classmates and I go to the school yard.” 可知，我和同学们去校园里。故选 B。

3.3.What do we do first?

A Dig holes.

B Draw trees.

C Sing songs.

D

解析：选A。A细节理解题。根据文中的 “First, we dig holes with small shovels” 可知，我们首先挖坑。故选 A。

4.4.Who helps us?

A The doctor.

B The driver.

C The teacher.

D

解析：选C。C细节理解题。根据文中的 “Our teacher helps us, too.” 可知，老师帮助我们。故选 C。