Question

The thing I _____(think)was impossible had really happened.

这道题的正确答案还有分析，拜托了！

Answer 1

The thing i thought was impossible had really happened.

你之前认为不可能的事情，也就是说是你以前想的东西。所以是过去式的"thought"

再来一个例子：I have always thought that Mary was a nice girl.(我曾经认为玛丽是个好女孩)
同样的道理，是过去式的“thought”

追问

这道题下没有什么隐含的考点么？

追答

考点我不清楚……
但是如果你真在考试的时候看不出答案，那就看一下句子。

The thing I _____(think) was impossible had really happened.

was, had, happened 都是过去式的啊！所以整句也应该是过去式的。