补全对话。
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.
（1）Are the trees very important to people?
（2）we brought young trees.
（3）Did you go to plant trees
（4）we used spades to dig holes
（5）got water from the river nearby.
听音填空。
（1）On Flag Day, we _________ flags and __________ songs.
（2）Thanksgiving is my _____________ _______________.
（3）____________ to you.
（4）This is my __________ in China.
选择词填空，并把正确答案写在题中横线上，注意大小写。
（1） some beautiful squares in Dalian .
（2） a book and a pen on her desk .
（3）They a lovely dog.
（4）She some photos.
（5）The desk four legs.
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