The best way to find the correct answer for a sentence completion would be : find that part of the text and look for the answer.
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hope this helps
They are called abrasion.
<span>When new data calls current scientific explanation into question scientists must repeat the experiments to verify results and reevaluate said scientific explanations, if necessary, based on results, then scientists can develop a new hypothesis and test that.</span>
<span>Leather shoes are made from natural polymers; raincoats are made from synthetic polymers. </span>
