<ol>
<li>Laughing because they had missed their stop while reading the map, the task for the tourists now was getting off the bus and back to their destination.</li>
</ol>
<p>(A) task for the tourists now was
(B) tourists' task now was
(C) tourists now facing the task of
(D) tourists nevertheless now faced the task of
(E) tourists now faced the task of</p>
<p>E is correct, but why is D incorrect? Isn't the word "nevertheless" appropriate because although they were laughing, there was a problem at hand?</p>
<ol>
<li>When Catherine the Great had a magnificent dinner service of Sevres porcelain made for her, she was scandalized by its great cost, which became the subject of prolonged controversy.</li>
</ol>
<p>(A) which became
(B) so it was to be
(C) with a result that it was destined to become
(D) therefore becoming
(E) consequently it would become</p>
<p>A is correct, but why is D incorrect? I understand that "therefore becoming" would make Catherine the subject of controversy, but how do we know it's the great cost and not Catherine?</p>
<ol>
<li>Though the damage caused by strip-mining was often irreparable to the natural environment, it was once used to supply half the coal produced annually in the United States.</li>
</ol>
<p>(A) Though the damage caused by strip-mining was often irreparable to the natural environment, it
(B) Though irreparable damage is caused often to the natural environment by strip-mining, it
(C) Though strip-mining often caused irreparable damage to the natural environment, it
(D) Despite the fact of often irreparable damage to the natural environment, strip-mining
(E) In spite of often irreparable damage to the natural environment, strip-mining</p>
<p>The correct answer is C, but why is E incorrect? In fact, E keeps the subject ("strip-mining") closer to its description clause in the second part of the sentence, whereas in C, strip-mining is broken up with the second clause started by the ambiguous "it".</p>