给下列单词归类（同一类的单词写在同一棵树上，只写序号）。（1） （2） （3）
Push,Mike. A. I B. we C. her
The students arethe playground. A. on B. in C. behind
Liu Tao is playing the swing. A. inB. between C. on
How manyare there in your class? A. boy B. boys C. girl
Miss Chen is ______math teacher. A.a B. an C. the
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