请问what to expect from college life 这里的动词不定式做什么成分

这些结构不单独做成分,而是整体做成分.应该在一个完整的句子中说它们的成分.如：She doesn't know what to expect from college life/how to manage time at school.这个句子中作宾语.
再如：How to manage time at school remains a problem to him.此句中作主语.