—You’ve made great progress in your English study, haven’t you?
—Yes, but much .
A. remains to do
B. is remained to do
C. remains to be done
D. is remained to be done
网友回答
A. remains to do
B. is remained to do
(答案→)C. remains to be done
D. is remained to be done
解析：考查非谓语动词。句意“你的英语学习已经有了很大的进步，不是吗？”“是的，但是还有很多事情要做。”remain to be done是固定句型，意为“......有待被做”。much和do是动宾关系，应该用被动形式。故选C。