He built a telescope he could study the skies A.in which Bwith that Cthrough which Dby it 与解析【紧
问题描述：
He built a telescope he could study the skies A.in which Bwith that Cthrough which Dby it 与解析【紧
答
C
通过这个telescope,用through
首先排除B和D,因为这是一个定语从句,没有这两种说法,一般是介词+which,然后in 是在里面的意思,本句是说,他建立了一个他可以研究天空的望远镜