题目内容
（请给出正确答案）
[单选题]
_____ it doesn’t matter to you, it matters to us all .
A.When
B.While
C.Since
D.Because
提问人：网友upzone
发布时间：2022-01-07
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It matters not what you learn, but when you once learn a thing, you must never give it up until you have mastered it. It matters not what you inquire into, but when you once inquire into a thing, you must never give it up until you have thoroughly understood it. It matters not what you try to think of, but when you once try to think of a thing, you must never give it up until you have got what you want. It matters not what you try to carry out, but when you once try to carry out a thing, you must never give it up until you have done it thoroughly and well.
If another man succeeds by one effort, you will use a hundred efforts. If another man succeeds by ten efforts, you will use a thousand.
According to the author, first of all one must______.
A．analyze
B．inquire
C．obtain knowledge
D．act
