thanks for _helping ___me __ A a lot of B a lot

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thanks for _helping ___me __ A a lot of B a lot
thanks for _helping ___me __ A a lot of B a lot

thanks for _helping ___me __ A a lot of B a lot
到底是哪个空要填?

不知道是天那个空啊,。。直觉选B.