根据对话内容，从下面方框中选择适当的单词填空，使对话内容完整正确。 Repor

题目：

根据对话内容，从下面方框中选择适当的单词填空，使对话内容完整正确。

Reporter：Can you introduce something about your latest class activity?

Monitor：Sure. The students from our class planted some lines of trees on March 12^th, 2008.

Reporter：How did you plant trees?

Monitor：First, the students were                  小题1:              into groups of four. Next, each group of students planted a tree. Then, they poured some water over the trees.

Reported：How do you    小题2:     for the trees?

Monitor： We plan to come back and look after the trees          小题3:              .

Reported：Sounds good. Could you tell me why you choose to do that?

Monitor：As you know, pollution has become one of the most serious    小题4:   . We would like to try our best to improve our environment. 

Reporter：Well, it’s very meaningful. If everyone can do something to protect the environment        小题5:, our city will become much more beautiful.