it is in some parts of the world___goats,rather than cows,serve as an important source of milk
问题描述：
it is in some parts of the world___goats,rather than cows,serve as an important source of milk
A there B in which C where D that
答
强调句型.it is ...that.建议参考相关知识点.可以分析下句子成分,它要强调的是 goats（山羊）,而不是somewhere,所以我选的话选D.