Generally speaking，prices of daily goods through the Internet are lower than store prices.
A. to buy
B. are bought
C. buying
D. bought
网友回答
A. to buy
B. are bought
C. buying
(答案→)D. bought
解析：
buy和其逻辑主语goods是动宾关系，也就是说，goods是动词buy的接受者，所以用过去分词表被动，作后置定语。