professor Wang,who i __ abroad ,still teaches in the school

题目

professor Wang,who i __ abroad ,still teaches in the school
A.think went B.think to have gone C,thought went D.thought had gone
选哪个呀

答案

D
think是以前的动作,用过去时thought
认为之前就走了的,用过去完成时.
所以是thought had gone