分类：教育/科学-学习帮助
问题：Learninganotherlanguageislikeste? 
Learning another  is like stepping out of a door ,（    ） I can look back and see more clearly my own language .A．by which   B．which C．through which   D．on which 
回答：C．through which 
前面说了学习另外的一种语言就像是走出了一道门，
那么后面的句中是通过这扇门我可以回首和更清楚地看到我的母语。
我个人认为应该用介词through 
不当之处，敬请见谅