题目内容
【题目】补全对话。（5%）
A: last Sunday?
B: Yes, I did. My classmates and I went to plant trees.
A: How did you plant trees?
B: First, we in the ground. Then, we
and put them into the holes.
After that, we . We watered the young trees.
A: ?
B: Yes, they are. They can stop the wind and they can make the air fresh and clean.
A: We should plant more trees.
【答案】（3）（4）（2）（5）（1）
【解析】
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