Question

I've worked with children before, so I know what _____ (expect) in my new job.

求答案及解释，谢谢。

Answer 1

to expect
这里的结构是：疑问词+ 不定式，相当于一个从句，在这一句中是一个what引导的宾语从句，做know的宾语。可以写成 I've worked with children before, so I know what I except in my new job.
举一个更简单更容易懂的例子吧。
I don't know what to do.
相当于I don't know what I can do.
换成副词也可以，比如：I don't know where to go.
相当于I don't know where I can go.

Answer 2

to expect