Since then, more than 2 billion apps have been downloaded at prices free to $900.
A. ranging between
B. ranging from
C. rang between
D. rang from
网友回答
A. ranging between
(答案→)B. ranging from
C. rang between
D. rang from
解析：考查非谓语动词。range from从 ... 到 ... 范围，在句中作定语，修饰名词price，为主动关系，故用现在分词，选B。