Could you please tell me _____ to repair our fax machine?

Could you please tell me _____ to repair our fax machine?
A、how much it costs
B、how much cost is
C、how much costs it
D、how much does it cost
【正确答案】：A
【题目解析】：tell后面接的是宾语从句，用陈述句语序，故选A。