navitasan The assumption is that sentence '2' is uttered in a context where the speaker is not asking for a permission and merely wondering what is there to be done In that case it's unnatural. I'd use 'can'.
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navitasanThe assumption is that sentence '2' is uttered in a context where the speaker is not asking for a permission and merely wondering what is there to be doneIn that case it's unnatural. I'd use 'can'.