Is this the place he used to live?A. whereB. whichC. thatD. on which

问题补充：

Is this the place he used to live?

A. where

B. which

C. that

D. on which

答案：

(答案→)A. where

B. which

C. that

D. on which

解析：可联系答.案.网客服索取。