单选题 Dating from around A. D. 1000,the largest mound surviving from the Mississippian culturewas one hundred feet high and had a base of nearly fifteen acres.
【正确答案】 A
【答案解析】画线词culture有好多意思。这里指文明、文化。A．civilization同义。正确答案为A。辨义：B．formation构成；C．sect宗派，宗教教派；D．edifice大厦。