<p>Finding the error</p>
<p>Advances in seismology -have led- some scientists -to speculate- that we -will predict- earthquakes -as accurate as- we predict the weather. No error</p>
<p>Improving Sentences</p>
<p>-In believing that- firsthand experience would add to the credibility of her biography of Matthew Henson, a discoverer of the North Pole, the author spent a winter north of the Arctic Circle.</p>
<p>A. In believing that
B. Believing that
C. Because believing that
D. She believed that
E. Since having believed that</p>
<p>Why can't D be correct?</p>
<p>Having spent seven years correcting errors in the text, -a new edition of James Joyce's Ulysses has been published by Hans Walter Gabler.-</p>
<p>A. a new edition of James Joyce's Ulysses has been published by Hans Walter Gabler
B. Hans Walter Gabler's new edition of James Joyce's Ulysses has been published.
C. there is a new edition of James Joyce's Ulysses published by Hans Walter Gabler
D. Hans Walter Gabler has published a new edition of James Joyce's Ulysses
E. James Joyce's Ulysses has been published in a new edition by Hans Walter Gabler.</p>
<p>Why can't it be B? Is it because Hans Walter Gabler's new edition is not modifying having spent seven years?</p>
<p>Many Americans are passionate about preserving natural resources, which makes it a fierce political debate. </p>
<p>A. which makes it a fierce political debate
B. and the political debate about it being fierce
C. thus the political debate is fierce
D. this situation makes for fierce political debate
E. a situation that makes for fierce political debate</p>
<p>Why can't it be A?</p>
<p>Thanks.</p>