—Hi, Lydia. Are you going to the concert on Friday?

—I’d like to. But there are so many problems_______.

A. remaining to be settled         B. remained settling

C. remaining to settle            D. remained to be settled

---Hi, Lydia. Are you going to the concert on Friday?

---I’d like to. But there are so many problems_______.

1. A.
   remaining to be settled
2. B.
   remained settling
3. C.
   remaining to settle
4. D.
   remained to be settled

—Hi, Lydia. Are you going to the concert on Friday?
—I’d like to. But there are so many problems_______

1. A.
   remaining to be settled
2. B.
   remained settling
3. C.
   remaining to settle
4. D.
   remained to be settled