单选题If there’s a lot of work ______ , I am happy to just keep on until it is finished to do.A to be doneB to be doingC doneD doing

题目内容(请给出正确答案)
单选题
If there’s a lot of work ______ , I am happy to just keep on until it is finished to do.
A

to be done

B

to be doing

C

done

D

doing

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