你能通过羽毛判断鸟的性别吗？

Can you tell the ___sex of a bird by its feathers?

现代技术让父母能早期知道宝宝的性别。

Modern technology allows parents to know their baby's ___sex early.

请在表格上填写你的个人详情，包括性别。

Please fill in your personal details, including your ___sex, on the form.