What text are you talking about ?Mark Twain had many books. Include a snippet of the text ,so I can answer the question.
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I think everybody is same problem when first time job like stressful and first time no one knows what to do plus just thinking about how to do.
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there it is
Explanation:
It is an French expression referring to someone or something like 'there she is' or 'there it is'
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Their is many people around the world
He is only serious about his passion but when it comes to anything else he does not care and is careless