--You have made 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

—You have made 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

---You have 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

---You have made great progress in your English study, haven’t you?

--- Yes, but much _____ .

1. A.
   remains to do
2. B.
   is remained to do
3. C.
   remains to be done
4. D.
   is remained to be done

--You have made great progress in your English study, haven’t you?

--Yes, but much _____ .
A. remains to do                          B. is remained to do