The poem presents traditional views on the role of women and of the social practice of seclusion and contrasts this expectation with the oppression and despair that this practice creates.
They couldn't hear me,.......? (Supply the correct question tag)
They couldn't hear me, <u>could </u><u>they?</u>
Here we used '<u>could they?'</u> as the question tag because couldn't which is negative has already been used in the question. Then, the question has the subject as 'they' which is plural, so 'they' is also used in the question tag.