短文改错（共10小题，每小题1分，满分10分）

My friend Jack who was always working hardly so that he could earn enough to buy a car of his own. He used to say, “My life will be better when I get a nicer car.” It took him more than three years to make his dreams come true. However, Jack was not satisfied with what he has achieved. He worked even harder, hoping that he would able to buy a big house with a beautiful garden. One day, I told himself that happy is a journey, not a destination. Try to do what you like and enjoy what you can enjoy at the present, and you will feel regretful when you are too old to do anything.

已经注册的责任编辑如果变更出版单位或者取得高一级职业资格，应当在（）个月内按照首次注册的具体规定申请办理变更注册手续。

A.3

B.6

C.9

D.12