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。