Here's a question: The student had difficulties reading, he would furrow his brow while doing what on a line of the book?  Here are possible answers to this question: - concentrating - concentration - acquiring knowledge - sleeping - written material  I believe the correct choice is "concentrating", here's why:
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Answer: rivers flow trough valleys.


Here's a question: What does running after balls lead to?  Here are possible answers to this question: - sweating - physical exertion - fitness - catching up with - sprinting  I believe the correct choice is "physical exertion", here's why:
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Answer: people feel physically exerted while running


Here's a question: The inspector judged it to be a copy, it was not a what of the original artist?  Here are possible answers to this question: - creation - hatred - paste - soft copy - unique  I believe the correct choice is "creation", here's why:
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Answer:
this word is more relevent