Is this the factory you visited the other day?
A. that B. where C. in which D. the one
3. Is this factory some foreign friends visited last Friday?
A. that B. where . C. which D. the one
4. Is this the factory ______ he worked ten years ago?
A. that B. where C. which D the one
理由顺便也告诉我吧..最头疼定语从句
