我父亲在喝早咖啡前总是脾气暴躁。

My father is always ___bad-tempered before his morning coffee.

持续的挫折感会让人逐渐变得脾气暴躁。

Continuous frustration can make someone ___bad-tempered over time.

应对脾气暴躁的顾客需要很大的耐心。

Dealing with a ___bad-tempered customer requires a lot of patience.