chengzhiying

The single-family house constructed by the Yana, a Native American people who lived in what is now northern California, was conical圆锥形的 in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and banked with dirt to a height of three to four feet.
A.banked with dirt to a height of
B.banked with dirt as high as that of
C.banked them with dirt to a height of
D.was banked with dirt as high as
E.was banked with dirt as high as that of
句子结构；
the single-family house, was conical in shape, its framework....
首先看and之后的动词是bank with，然后判断bank with的主语是前面的house还是后面的framwork of poles.很明显bank的主语是poles,所以and之后划线部分要与overlaid with slabs of bark平行。 排除D,E
然后看搭配， a height of是固定搭配，排除B。剩下A和C，C里面那个them不对，连起来就是its framework of poles banked them with，有指代问题。所以就剩下A了