问题描述：
求完整解析 Toronto is a big,beautiful and effiicient city,( ) that developed from a little
city over the past half century and became the center culture,commerce and communications in Canada.
A.the ome B.one C.that D.a one
city over the past half century and became the center culture,commerce and communications in Canada.
A.the ome B.one C.that D.a one
问题解答：
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