They are considering _____house before the prices go down.

问题描述:

They are considering _____house before the prices go down.
A.of selling B.selling C.with selling D.to sell
The answer is B,I want to know why.Thank you for your help!

They are considering selling house before the prices go down.
他们正在考虑价格下跌之前卖房子.
consider doing sth.考虑做sth.是固定搭配