Is this factory _________ some foreign friends visited last Friday?
A. that
B. where
C. in which
D. the one
Is this the factory ______ he worked ten years ago?
A. that
B. where
C. which
D. the one
The wolves his themselves in the places _________ couldn't be found.
A. that
B. where
C. in which
D. in that
I'll tell you ________ he told me last week.
A. all which
B. that
C. all that
D. which
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