他老是丢钥匙，这让他妻子非常恼火。

He kept losing his keys, much to the ___annoyance of his wife.

预订电脑室的混乱引起了用户的普遍不满。

The disorganization in booking computer rooms caused widespread ___annoyance among the users.

当项目再次延迟时，她无法掩饰自己的恼怒。

She couldn't conceal her ___annoyance when the project was delayed again.