一个英语题、用所给的词的适当形式填空、要翻译

问题描述:

一个英语题、用所给的词的适当形式填空、要翻译
The Smith are the thinking of _________(go) to Spain for vacation.
要翻译哇!

The Smith are thinking of ___going______(go) to Spain for vacation.
史密斯一家人正考虑确西班牙度假的事.(介词后的动词要用-ing形式)