There is no question that is specifically quoted as being asked by the grandmother repeatedly, however, as the story progresses it is made clear that she consistently spends time with her granddaughter to ask her about her life in America and the things of which she cannot even begin to imagine or dream. Consider what the narrator tells us about the time they spent together:
From then on, whenever I wasn't taken to visit relatives, I accompanied Da-duh out into the ground, and alone with her amid the canes or down in the gully I told her about New York. It always began with some slighting remark on her part: "I know they don't have anything this nice where you come from," or "Tell me, I hear those foolish people in New York does do such and such..." But as I answered, recreating my towering world of steel and concrete and machines for her, building the city out of words, I would feel her give way.
The insatiable curiosity of Da-duh is shown through her repeated questioning of her granddaughter as she craves to discover more about this new world which is like another planet compared to her home. Of course, as the granddaughter responds, creating her world out of her words, Da-duh realises the limitations of her world and "surrenders," resulting in her death.