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

问题补充：

—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

答案：

(答案→)A. remaining to be settled

B. remained settling

C. remaining to settle

D. remained to be settled

解析：考查非谓语动词。Remain无被动，所以用remaining；而问题是要被解决，应用不定式的被动形式，所以选C。