<p>Hi, I have some writing questions and I would be very happy if you guys can explain them to me :D</p>
<p>page 480 #28</p>
<p>The quality of multivitamin tablets (is determined) by (how long) (its) potency (can be protected) by the manufacturer's coating material (no error).</p>
<p>I put no error, but the correct answer is C but I don't understand why. Isn't "its" possessive?</p>
<p>page 429 #8
Surface mining is safer, quicker, and cheaper than deep mining, but (the greater is its toll in human history).</p>
<p>A. the greater is its toll in human misery
B. it has a greater human misery toll
C. in its human misery toll it is greater
D. there is the greater toll in human misery
E. its toll in human misery is greater</p>
<p>I chose B because I thought it was the most concise but the answer is D (is it because surface mining can't "have" something?)</p>
<p>page 417 #26
Air pollution caused by industrial fumes (has been studied) for years, (but) only recently (has) the harmful effects of noise pollution (become) known.</p>
<p>I chose D because I thought it should have been became but the answer is C. Isn't "has" singular and isn't the subject noise pollution?</p>
<p>page 417 #28
(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.</p>
<p>I put A because I thought it should have been quickly to and I don't know why the answer is C</p>
<p>Thanks :D</p>