<ol>
<li>Because of exceptionally hilly terrain, [the final miles] [were] difficult for other guys. </li>
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<p>I picked up the phrase [were] because I thought that miles cannot be difficult; on the contrary people may find them difficult to cross. However, it was a wrong reasoning...</p>
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<li>For any major of a vast city area, an understanding of current issues in all sitricts is not only desirous but also vital.</li>
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<p>I picked up No Error; however, it was a wrong choice. </p>
<ol>
<li>It was obvious that all the members had planned carefully for the challenging debate, for [each] answer to the opening question showed evidence of having been prepared. </li>
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<p>Don't we use [each] with people and [every] with other things?</p>
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<li>Is [precocious for] a correct idiom?</li>
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<ol>
<li><p>is a diction error, it should be ‘desirable’</p></li>
<li><p>each can refer to anything- people, objects, etc… “each pen was blue.” sure, ‘every’ could be substituted for each, but as the sentence stands, it is grammatically correct and there would be no reason to change it</p></li>
<li><p>you should include the full sentence so everyone can see the context that the phrase is being used. if i recall correctly, the sentence was something like ‘the child was considered precocious for his parents’ or something. the correct terminology would be ‘precocious by,’ this is the only phrase that would make sense.</p></li>
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Difficult miles are like difficult times. The race is difficult to get through; difficult times are difficult to get through. In this context, the meaning of “difficult” is “hard to bear” or “hard to carry on through.” Distance and time are similar in that people go though them. You can call people difficult, too, because they can be hard to bear.
“desirous” should be “desirable.” If I desire a piece of candy, then I am desirous of a piece of candy, and the candy is desirable to me. In other words, the subject of the desire (the person with the desire) is desirous of the object of the desire (the thing itself that the person has desire for), the desirable piece of candy.</p>
<p>That sentence is saying that an awareness about current issues is not only desirable (it is something that people want), but also necessary (it is something that people need). “desirous” is simply the wrong word. These errors are called diction errors, errors in word choice. These are rare in the SAT, but they are routinely tested. An SAT normally has 0, 1, or 2 writing questions with diction errors.
No. Both “each” and “every” can apply to both people and other things. Each answer seemed like they were prepared. Every answer seemed like they were prepared. Each person in the room is important. Every person has a nose.
No, “precocious for” is not an idiom. (An example of an idiom is “break a leg,” which means “good luck.” Idioms have nothing to do with the phrase “precocious for.”) “precocious” means “exceptionally developed.” An 8 year old who is smarter than the average 20 year old is precocious. “precocious for” can be correct if you use it correctly in context, as in People consider me precocious for some reason.</p>