writing questions

<p>Air pollution cause by industrial fume [has been studied] for years, [but] only recently [has] the harmful effects of noise pollution [become] known. [no error]
answer: C. has </p>

<p>[Quick to] [take advantage] of melanie johnson's [preoccupation in] the history of the johnson family, the genealogist proposed investigating [that] history- for a large fee.
answer C preoccupation in </p>

<p>[Contrasting with] [most other] fifteenth-century rulers, Portuguese kings [could count on] the support of the aristocracy [in any] overseas adventure.
answer: A. contrasting with</p>

<p>can anyone please explain to me the errors in the sentences? thanks</p>

<ol>
<li>Subject-verb agreement. “has” is singular but “effects” is plural so it should be changed to “have”</li>
<li>Idiomatic error. It should be preoccupation “with” not preoccupation in. </li>
<li>Idiomatic error. I believe it should be “in contrast to” rather than “contrasting with”</li>
</ol>

<p>A lot of these are just idioms, which you learn over time, but there are only a few that are tested on the SAT. Here’s a list that could be helpful to you: [SAT</a> Idioms - Quizlet](<a href=“http://quizlet.com/658772/sat-idioms-flash-cards/]SAT”>http://quizlet.com/658772/sat-idioms-flash-cards/). It’s a long list, but it’s worthwhile to study them.</p>

<p>thanks
10 char</p>