<p>First of all I wanna note that this sentence does not seem to me to be a question that would appear on the SAT. So I advise you to use only material released by the College Board and the test-makers themselves (particularly The Official SAT Study Guide, aka the blue book) because that material is the most accurate and more similar to the questions you’ll see on the SAT than material made by independent companies like Princeton Review and Barron’s.</p>
<p>Anyway, there is a problem with the structure of that sentence. There is one clause that starts with “although” and another clause that starts with “even though,” so logically there are two SEPARATE things that serve as a contrast to the clause “he has lived here longer than I.” To make the original sentence coherent you would have to COMBINE these two concepts into one “although …” clause, as in (shortened so it reads better) Although I know this neighborhood well while my friend doesn’t, he has lived here longer than I. If you separate the concepts, then they would be treated independently and the sentence wouldn’t make sense.</p>
<p>Here are some examples of this case:</p>
<p>CORRECT: Even though he is fat and she is skinny, he runs faster than her.
INCORRECT: Even though he is fat, and even though he is skinny, he runs faster than her.
(The fact that he is fat and the fact that she is skinny have to be put together into one “even though …” clause in order for the sentence to make sense.)</p>
<p>CORRECT: When I am hungry and I eat, I get a sense of pleasure.
INCORRECT: When I am hungry, and when I eat, I get a sense of pleasure.
(The incorrect sentence is saying that you get a sense of pleasure when you are hungry, and you get a sense of pleasure when you eat. This doesn’t make sense.)</p>
<p>Also, a few more things to note:</p>
<p>1) “nevertheless” is redundant with “although,” so it should be removed. You wouldn’t say “In spite of the fact that I am fat, in spite of that fact I run fast.” “Although” already means “in spite of the fact that …” so you don’t need another word to show the contrast. You either say “Although I am fat, I run fast” or “I am fat; nevertheless, I run fast.”</p>
<p>2) “hardly” means “barely,” so someone who seems to barely know his or her neighborhood does know the neighborhood…just not well.</p>
<p>3) “he has lived here longer than I” is acceptable, meaning “he has lived here longer than I have.” It is also acceptable and standard to say “he has lived here longer than me.”</p>
<p>So, to conclude, a proper version of that sentence would be Although I know this house and this neighborhood as well as I know myself and my friend here seems hardly to know them at all, he has lived here longer than I.</p>