她花了一整天时间润色她的演讲稿。

She spent the whole day ___polishing her speech draft.

她正在用软布擦亮她的皮鞋。

She is ___polishing her leather shoes with a soft cloth.

她每天练习钢琴来提升演奏技巧。

She keeps ___polishing her piano skills by practicing every day.