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- Why do you look sad?- There are so many problems . [ ]A. remaining to settleB.

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- Why do you look sad?- There are so many problems . [ ]A. remaining to settleB.

— Why do you look sad?
— There are so many problems ________.  [     ]A. remaining to settle
B. remained settling
C. remaining to be settled
D. remained to be settled

试题答案

C