在他第一天上班时，老板就让他直接面对困难，给了他一个主要客户处理。

On his first day, the boss ___threw him ___in ___at ___the ___deep ___end by giving him a major client to handle.

新老师经常被直接扔进深水区，面对大班教学且缺乏指导。

New teachers are often ___thrown ___in ___at ___the ___deep ___end with large classes and little guidance.

公司让实习生直接面对困难，以测试他们在压力下的适应能力。

The company ___throws interns ___in ___at ___the ___deep ___end to test their adaptability under pressure.