This could be implemented though. Based on the part of the sentence that is understood, figure out most likely words for the missing part and ask a specific question about it to fill the gap.
See, it's not about hard coding such behavior. I would say that it reaches human level of understanding if it automatically learns these ways of solving the problem. Asking relevant questions can be hard coded, but it doesn't equal "understanding" the problem.
I think the chinese room experiment overlooks this part of "understanding"
