Can you make sure_______ the gold ring?
A.where Alice had putB.where had Alice putC.where Alice has putD.where has Alice put在线课程C
解析：
考查时态和宾语从句的语序。宾语从句中使用陈述语序，排除BD。本句没有出现过去的过去的时间状语，排除A。故C正确。