unpredictable ·adjective

那里的天气可能有点难以预测——一会儿晴空万里，下一刻就下大雨。

The weather there can be a bit ___unpredictable - one minute it's blue skies and the next minute it's raining hard.

这份工作的时间非常不可预测——你有时不得不临时加班到很晚。

The hours in this job are very ___unpredictable - you sometimes have to work late at very short notice.

那时我很紧张，因为有太多难以预料的事情发生。

By that time I was nervous because there were too many ___unpredictable things happening.