请问这个题的解释.
They fulfilled the plan earlier than they____ .
A.have expected B.were expected C.were expecting D.had expected
请问为什么是选择D啊.我选择B表示“被期待”不行啊?有的同学说fulfill优先于expect,但是,题中不是说fulfilled the plan earlier than sth 应该是expect优先于fulfill吧?