The radio club in our school used to be poorly run is now very popular among students.

问题补充：

The radio club in our school, used to be poorly run, is now very popular among students.

A. that

B. which

C. what

D. where

答案：

A. that

(答案→)B. which

C. what

D. where

解析：可联系答.案.网客服索取。