面包师每天早晨订购一打鸡蛋。

The baker ordered a ___dozen eggs every morning.

她为学校集市准备了三打纸杯蛋糕。

She prepared three ___dozen cupcakes for the school fair.

只有大约十二名参与者注册了研讨会。

Only a ___dozen participants registered for the workshop.