分类：教育/科学-外语学习
问题：英语Hebuiltatelescope___hecouldstu 
He built a tecope ___ he could study the skies.A.which  B.in which  C.by which  D.through which选C还是选D,为什么
回答：个人认为选D
句意是:他造了一台望远镜,通过它可以研究星空
 这里选介词 through 是指＂通过＂　　介词through　表示的是通过某个相对封闭的空间，此处符合望远镜的构造，应选Ｄ

再给个through 的例子吧

In summer days, he always goes to walk through the avenue 
instead of the bare road.  avenue是林荫道，相对封闭的空间