money it remains to be seen whether we can put the idea into practice.A. Lacked B. Lack

问题补充：

money , it remains to be seen whether we can put the idea into practice.

A. Lacked

B. Lack of

C. Lacking

D. Having lacked

答案：

A. Lacked

B. Lack of

(答案→)C. Lacking

D. Having lacked

解析：考查现在分词做状语：lack of 表示因缺少时前面应加介词for/through，排除AB;lacking是现在分词做原因状语，因为缺少信心这种状态时一直存在的所以不用完成时态，可排除D。句意：因为缺钱，是否我们可以把想法付诸实施还有待证实。故选C。