Is this the factory you visited the other day?
A. that B. where C. in which D. the one (有THE限定了,D不可,不需要介词,BC不可)
3. Is this factory some foreign friends visited last Friday?
A. that B. where . C. which D. the one (需要限定,D)
4. Is this the factory ______ he worked ten years ago?
A. that B. where C. which D the one (缺IN WHERE=INWHICH)
