Question

My father asked him_____ Awhy to do B what he did it for C what to do it Dhow he did with it

Answer 1

此题应选D
楼上选B，我有异议。因为若选拍旦B，what应该是充当did的宾语，而B项中did已有宾语it,　故did有两个宾语，一个是what，一个是袭链扰唤洞it,
二者重复。排除C的理由也是如此，do有两个宾语，重复。