![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Many people talk about 'Didi'. I really wonder ______. 此题出自2015年黑龙江地区中考英语真题及答案,2015年黑龙江地区中考英语试题及答案 —Many people talk about "Didi". I really wonder ______. —You call to order a taxi through it on your mobile phone easily. A. how can I use them B. who uses them most C. what they are used for