聽錄音,把空缺的地方補充完整。
      It's ___________ in the afternoon. It's time to go ___________. But we must clean 
our ___________. There are six ___________ in our group. Look! Liu Yong is carrying 
some ___________ onto the desks. I'm carrying ___________. And the other is cleaning the
___________. At last, our classroom is very clean.
five, home, classroom, students, chairs, water, floor
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