题目内容：

一道英语题Titanic sank on its first journey,though people
Titanic sank on its first journey,though people ( ) it would never have any problem.
A.were thinking B.have thought C.thoght D.had thought

优质解答

D.had thought 过去的过去,用过去完成时
因为“认为”这个动作是发生在Titanic sank 之前,sank是过去式,所以是过去的过去用过去完成时,had thought