Usually E-mail is than long-distance callingA. more cheapB. more cheaperC. most cheapD. m

网友回答

A. more cheap
B. more cheaper
C. most cheap
(答案→)D. much cheaper
解析：比较级用于表示两个事物进行对比，最高级表示三个或者三个以上事物进行对比，比较级前可用a   little ,a few  ,much ,far ,even 等进行修饰，表示比较的程度。