It was in the lab was taken charge of by Mrs Smith they found the missing necklace.A. w

问题补充：

It was in the lab, was taken charge of by Mrs Smith, they found the missing necklace.

A. where; that

B. that; that

C. which; that

D. which; where

答案：

A. where; that

B. that; that

(答案→)C. which; that

D. which; where

解析：which 引导非限制性定语从句,that引导强调句。