The mother bought telescope for his son_____he could observe the skies ,whichmade the son very happy1.whom2.which3.for whom4.through which要原因
问题描述：
The mother bought telescope for his son_____he could observe the skies ,which
made the son very happy
1.whom
2.which
3.for whom
4.through which
要原因
答
4
这是一个定语从句，是带介词的，through which，which就是指的telescope
答
4
先行词是telescope 从望远镜中观察用 observe through the telescope
所以选through which