The meeting started at ten o’clock, but the chairman has not _________ yet.
We are using so many raw materials every day, which _______ that they _______.
On average, 50 percent of those _____ said they would prefer to see Mr. Obama win the 2012 ticket, _____to just nine percent who prefer Mr. Romney.
South Korean star PSY's “Gangnam style” video,________, has set the Guinness World Record for the most “liked” video in YouTube history.
Since I know ______ , I understand why they needed so much money.
There is _________ thing as a free lunch.