问题
单项选择题
For a limited time only, this exquisite collector's item will be offered at forty percent off of the original ().
A. price
B. piece
C. challenge
D. certificate
答案
参考答案：A
解析：
根据句中的“will be offered at forty percent off”可知此空应填入和价格有关的单词，故本题正确答案为A。