It is not easy to learn English well but if you ________, you will succeed in the end．
A.hang upB.hang aboutC.hang onD.hang around在线课程C
解析：
hang on表“(在逆境中)坚持，不放弃”之意。hang up挂断电话；hang about闲荡；hang around(在某处附近)等待，逗留。