这是他上班的第一天，他看起来有点不知所措。

It was his first day in the office and he seemed a bit ___lost.

我可以想象一些客人感到有点不知所措。

I can imagine that some of the guests felt a bit ___lost.

在没有适当培训的情况下开始新工作，他完全不知所措。

Starting the new job without proper training, he was completely ___lost.