----How did he finish the work?-I hear that he did it A. in the ownB. on his ownC. of

问题补充：

----How did he finish the work?

---- I hear that he did it

A. in the own

B. on his own

C. of the own

D. all his own

答案：

A. in the own

(答案→)B. on his own

C. of the own

D. all his own

解析：句意：他是如何完成工作的？我听说他是独立完成的。on his own独自地，故选B