问题描述：
What are they doing? -They re cheering___their Class team.
最佳答案：
What are they doing?
-They are cheering for their class team.
他们正在为他们班级欢呼。
cheering for：为…欢呼
例：cheering for life：为生命喝彩
??最佳答案：
题目：on,for,with的运用：What are they doing? -They are cheering---their Class team.
最佳答案：
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