<ol>
<li><p>By virtue of its (A) size and supersensitive electronics, modern radio telescopes are able to gather more waves and discriminate among (B) them (C) with greater precision than (D) earlier versions could. No error (E)</p></li>
<li><p>Air pollution caused by industrial fumes has been studied (A) for years, but (B) only recently has (C) the harmful effects of noise pollution become (D) known. No error (E)</p></li>
<li><p>The starling is such a (A) pest in rural areas that it has become (B) necessary to find ways (C) of controlling the growth of their (D) population. No error (E)</p></li>
</ol>
<ol>
<li>“its size” should be plural in order to match telescopes.</li>
<li>“has” should be plural in order to match effects.</li>
<li>“their” should be singular to match starling.</li>
</ol>
<p>It appears as though your main weakness is distinguishing between singular/plural tenses.</p>
<p>Delago’s Dillema was (like many other) young writers: he (had to choose) between assured publication in a student magazine (and) (Probable rejection by) a popular magazine</p>
<p>^illogical comparison. Comparing a dilemma to writers. Can’t do that on the SAT. You have to compare apples w/ apples and oranges w/ oranges (i.e. dilemma w/ dilemma and writers w/ writers).</p>
<p>whats the error for question 20 pg 661 in the BB</p>
<p>In 1850 Jim Beckwourth, a Black American explorer, (discovered) (in the) mountains of the sierra Nevada a pass (soon becoming) an important (gateway to) california gold-rush country
Ans: C</p>
<p>Question 18 pg 660 BB
though (best known) as a jazz vocalist, he ( also enjoyed) gospel music, (whereby) he told his manager that he wanted to make a (recording of) his favorite gospel music.
Ans: C</p>