We are very annoyed ________ his mistake

问题完形填空

We are very annoyed ________ his mistake, because we have emphasized this for several times.

答案

at/about　

句意：我们对他的错误感到非常生气，因为我们已经对此强调了许多遍了。be annoyed at/about sth.“因为某事而生气或恼火”，与句意相符。