—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
—Jim, how do your parents like country music?
—______ my dad ______ my mom likes it. They both like country music.
A. Either...or
B. Not only...but also
C. Neither...nor