她是学校里最受欢迎的老师。

She is the most ___popular teacher in the school.

步行在许多国家是一种受欢迎的锻炼方式。

Walking is a ___popular form of exercise in many countries.

那首歌在我父亲那一代人中很受欢迎。

That song was ___popular with people from my father's generation.