Their plan was . With it we had little trouble in finishing the work.
A. success
B. succeed
C. a success
D. a successful
网友回答
A. success
B. succeed
(答案→)C. a success
D. a successful
解析：抽象名词具体化本题中的a success指成功的事相当于a successful plan。句意：这个计划很成功，有了这个计划我们毫不费劲的完成了工作。