两个选择题
1.Is this the factory ___ he worked twenty years ago?
这个空是不是选where或in which 都对？答案只选where．
2.The building over there is library,__is our library.
A.on the east of which
B.to the east of it
C.east of which 这个题帮我解释下原因，谢谢了．
参考答案:1,都对where在这里=in which
2,C
east of which=to the east of which