<p>More than forty years [HAVE PASSED] [SINCE] a quarter of a million people marched on Washington, D.C., [IN AN ATTEMPT] [TO SECURE] civil rights for Black Americans. [NO ERROR]</p>
<p>I picked D because I thought it was unidiomatic. Shouldn't it be "of securing"? Correct me if I'm mistaken ;p</p>
<p>for 8. I bubbled C because I thought they used the term to show inspiration for rundown imaginations. The correct answer is B
For 9. I skipped. The answer is D. Dunno how to even think how to solve this question</p>