the birds are singing in the tree(就划线部分提问)

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thebirdsaresinginginthetree(就划线部分提问)thebirdsaresinginginthetree(就划线部分提问)thebirdsaresinginginthetree(

the birds are singing in the tree(就划线部分提问)
the birds are singing in the tree(就划线部分提问)

the birds are singing in the tree(就划线部分提问)
Where are the birds singing?( 对 in the tree 提问)

What are the birds doing in the tree?

不划线都能回答的我服了。

"划线部分"???