题干
----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(点此获取答案解析）
B
----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
