— Bob has gone to California.— Oh can you tell me when he ? A. has leftB. left C. is lea

问题补充：

— Bob has gone to California.

— Oh, can you tell me when he ?

A. has left

B. left

C. is leaving

D. would leaving

答案：

A. has left

(答案→)B. left

C. is leaving

D. would leaving

解析：考查时态。根据语境Bob已经去加利福尼亚，故问他什么时候离开的，用一般过去时，选B。