The potential of economic development of one region varies from of another.
A. any
B. that
C. one
D. some
网友回答
A. any
(答案→)B. that
C. one
D. some
解析：考查替代词的用法。 that替代同类异物可数名词或不可数名词，表特指。此处替代The potential one用以替代“a＋单数可数名词”，表示泛指。Some和any是不定代词，指一些，some常用于肯定句中，any常用于否定句和疑问句中。句意：地区的经济发展的潜力各不相同。