It’sreportedthatcustomerscouldstartusingtheirphonestob...

问题详情：

 It’s reported that customers could start using their phones to buy ______ coffee in some stores, which is ________ first pay-by-phone practice in the USA．

   A. a; the        B. /; /       C. a; /       D. the; the

【回答】

A

知识点：冠词

题型：选择题