It is a question _____.选哪一个?

问题描述:

It is a question _____.选哪一个?
A、what he did it
B、how he did it
C、that he did it
D、that how he did it

选D,典型的强调句型,强调句:it is ...that...
翻译:他是如何做到的,这是个问题.