【题目】—You've made great progress in your studies of English, haven't you?
—Yes, but much .
A. remains to do B. is reminded to
C. remains to be done D. is remained to be done
在线课程【答案】C
【解析】考查动词的用法。Remain是不及物动词，没有被动语态。根据句意：我虽然取得了进步，但是还有很多需要去做。那就是说这些需要做的事情是被我去做，要用被动表示，所以只能用to be done体现，故选C。