我们可以通过耳朵听到声音。

We can hear sounds through our ___ears.

她的耳朵对寒冷很敏感，冬天总是戴着耳罩。

Her ___ears are sensitive to cold, so she always wears earmuffs in winter.

老师提醒学生们上课时要竖起耳朵听讲。

The teacher reminded the students to keep their ___ears open during the lesson.

她对流行音乐有着敏锐的听觉。

She has a great ___ear for pop music.