As a new graduate,he doesn't know___it takes to start a business here

问题描述:

As a new graduate,he doesn't know___it takes to start a business here
A、how 、B what 、C、when、D、which
为什么不选A
意为:他不知道怎么样在这里开始他的事业

B what it takes to start a business here是what 引出名词从句做know的宾语,而在宾语从句中what作takes的宾语,因为是特殊疑问词,所以在从句中必须放在句首.
这个句子的意思是:作为新毕业生,他不知道在这里创业需要具备什么.