QUESTION: answer this: what is it called when a company has no competition??

ANS: monopoly

QUESTION: answer this: who played mark greene's first wife on er??

ANS: Christine Harnos

QUESTION: answer this: when did the first pretty little liars air??

ANS: June 8, 2010

QUESTION: answer this: how many trillion miles in a light year??

ANS:
5.9