他去年是班上的尖子生之一。

He was one of the ___toppers in his class last year.

这款手表在防水性能方面是同类产品中的佼佼者。

This watch is a ___top performer in water resistance among its peers.

她在冬天喜欢戴一顶毛呢礼帽保暖。

She likes to wear a woolen ___topper to keep warm in winter.