请教:新东方补充材料(蓝本)P190第17题

Many of them chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with hundreds of monasteries.

(A) Many of them chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with hundreds of monasteries.

(B) Chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with many hundreds of monasteries.

(C) Hundreds of monasteries, many of them chiseled from solid rock centuries ago, are dotting the mountainous regions of northern Ethiopia.

(D) The mountainous regions of northern Ethiopia are dotted with hundreds of monasteries, many of which are chiseled from solid rock centuries ago

(E) The mountainous regions of northern Ethiopia are dotted with hundreds of monasteries, many of them from solid rock centuries ago

答案是E, E中的them能否用which 代替,为什么?这里chiseled是用主动还是被动好?请指教.

many of them 是ETS的喜好。你去大全搜索就能发现many of them是正确答案的长相。