The Smiths bought a new house but () will need a lot of work before they can live in it.

问题描述:

The Smiths bought a new house but () will need a lot of work before they can live in it.
A it B they(我不明白是史密夫一家人需要工作,还是房子需要工作(被动))的

A it .因为will 前面的主语是house.