What a beautiful hat ! How much did it you ? It’s . I’m very lucky to be the 10

问题补充：

. --- What a beautiful hat ! How much did it you ?

--- It’s . I’m very lucky to be the 1000th customer of the shopping center.

A. charge; free of charge

B. charge; free of the charge

C. cost; free of charge

D. cost; free of the charge

答案：

解析：考查：charge 要价，其宾语是金钱，如：charge five dollars for the book；free of the charge免费的，根据题意所以选C。