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

问题补充：

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

A. Lacking

B. Lacked

C. To lack

D. Having lacked

答案：

(答案→)A. Lacking

B. Lacked

C. To lack

D. Having lacked

解析：句意：由于缺钱，我们能否把这个想法付诸实施还有待观察。lacking money是现在分词短语作原因状语。