It's the ability to do the job ( ) matters not where you come from or what you are.
A.one B.that C.what D.it
答：B
译：重要的是你的工作能力而不是你的出身或职业.
析：这是一个强调句型：It is A that matters not B or C.
由于谓语太短就一个词matters,所以将not or C后置了.本来也可以说：It is A,not B or C that matters.
不强调这个主语,则为：A matters,not B or C.
当然,要是这么写,这句话也还是头重脚轻的不得了:
The ability to do the job matters,not where you come from or what you are.
且容易误会,不容易理解句子的意思.
还有一种表达法是用名词性从句,what 从句：
What matters is the ability to do the job,not where you come from or what you are.