I wonder how much ________

I wonder how much ________

A.the watch costs

B.did the watch cost

C.the watch costed

D.does the watch cost

答案及解析： A

考察宾语从句.宾语从句中一般为陈述语序.句意:我想知道这块表花多少钱。物品的价钱是一个客观的存在，故应用一般现在时态，选A。