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When did the bison begin to live on the western plains of America?（2分）
AWhen the European immigrated to America.
BLong before the first Europeans arrived in America.
CAfter the Europeans immigrated to America.
DA short time before the first Europeans arrived in America.
AWhen the European immigrated to America.
BLong before the first Europeans arrived in America.
CAfter the Europeans immigrated to America.
DA short time before the first Europeans arrived in America.
参考答案