Chan’s restaurant on Baker Street used to be poorly run is now a successful business.A. t

问题补充：

Chan’s restaurant on Baker Street, used to be poorly run,is now a successful business.

A. that

B. which

C. who

D. where

答案：

A. that

(答案→)B. which

C. who

D. where

解析：which引导定语从句，指代上文中的Chan’s restaurant。根据逗号可判断出这是一个非限制性定语从句，在非限制性定语从句中只能用which引导而不能用that引导。who引导定语从句时，指人。where引导定语从句时，在从句中作地点状语。