迷惑ing。。。。。

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

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

这是个全画线题，答案是后面这个。many of them中的them不会指代不明么？

请告诉我上面这个错在哪里？迷惑ing。。。。。

更郁闷了。。。。

which指代不明的话，那them感觉更指代不明了啊

句子的意思上肯定是them指代hundreds of monasteries

能不能解释一下这个就近原则是什么？