问题
选择题
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
答案
答案：B
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。