我弟弟又在耍脾气，不肯分享他的玩具。

My little brother is ___being ___a ___pain again, refusing to share his toys.

必须记住所有这些不同的密码真是件烦人的事。

Having to remember all these different passwords is ___such ___a ___pain.

星期六要这么早起床真是讨厌。

It ___was ___a ___pain to get up so early on a Saturday.