Answer: Rainsford believed this because Zaroff stopped and his eyes climbed up the trunk of the tree. But his eyes stopped before he reached the limb where Rainsford lay and he smiled. Then he blew a smoke ring towards the tree and walked in the opposite direction. It’s obvious that Zaroff knew he was there, but was trying to prolong the game.
A comma should be after each separate things you are listing. The answer is:
<span>
The
Library of Congress is home to the world's most extensive comic-book
collection, oldest original newspaper collection, and most abundant
collection of cartographic items.</span>
The correct answer is B. The first sentence refers to a general proposition - <em>all combative sports should be strictly monitored</em> - and then it specifies that the Ultimate Fighting Championship (UFC) should fall into a category to be <em>monitored and regulated</em>.
The Great Depression happened in the 1920's and 1930's due to many economic disasters such as the Market Crash in 1929 and bad mistakes by the President (Hoover)
D has to be it but if its not then the answers B