他的幽默故事给聚会增添了不少趣味。

His funny stories really ___spiced the party.

她在演讲中穿插了一些个人经历，为观点增添了可信度。

She ___salted her speech with personal experiences to add credibility to her points.

她在煮汤时往锅里撒了些盐调味。

She ___salted the soup while cooking to enhance the flavor.