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Great changes have taken place since then in the factory _______we are working.

A. where         B. that           C. which      D. there

Great changes have taken place since then in the factory _______we are working.

A. where B. that C. which D. there

Great changes have taken place since then in the factory _______we are working.

A. where 　　 B. that 　　 C. which 　　 D. there

Great changes have taken place since then in the factory _______we are working.

A. where B. that C. which D. there

Great changes have taken place since then in the factory __________we are working.?

A.where                B.that                    C.which                D.there?