英语：Ithathehaddiedatleasttwentyyearsagowhenwemetlasttime.A.thoughtB.havethoughtC.hadthought正确答案是C,为什么?

Question

英语：I_____that he had died at least twenty years ago when we met last time.
A.thought
B.have thought
C.had thought
正确答案是C,为什么?

Answer 1

C, when引导的从句之前发生的事.
had thought本来以为,原以为,曾以为（强调过去的过去）
thought原以为（强调过去）
后面一般接that从句
Joe Pistone had thought he was going to goundercover for six month. Instead, he vanished for six years.
乔皮斯通本以为自己只要做六个月的卧底.却不曾想,自己一消失就是六年.
I didn't think you were here.