The Mississippi Riverboat, which evolved from simpler steamship of the early 1800's, became the dominant form of passanger transport on the Mississippi River.
the PP answer is B...but how I wanna know how to correct it....thanks...
以下是引用pegirl在2004-2-18 12:18:00的发言： The Mississippi Riverboat, which evolved from simpler steamship of the early 1800's, became the dominant form of passanger transport on the Mississippi River.
the PP answer is B...but how I wanna know how to correct it....thanks...
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发表于 2004-2-18 12:18:00
