―Look! What a mistake! Why?
―Sorry, I _________ on it.
| A．don’t concentrate | B．hadn’t concentrated |
| C．haven’t been concentrating | D．wasn’t concentrating |
We are using so many raw materials every day, which _______ that they _______.
| A．are running out ; will be used up |
| B．are being run out; will run out |
| C．have run out of ; will be using up |
| D．have run out; will run out of |
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.
| A．to be questioned; compared |
| B．having questioned; comparing |
| C．questioned; compared |
| D．questioning; comparing |
South Korean star PSY's “Gangnam style” video,________, has set the Guinness World Record for the most “liked” video in YouTube history.
| A．broke records | B．breaking records |
| C．to break records | D．breaks records |
Since I know ______ , I understand why they needed so much money.
| A．what a hard life they led | B．they led what a hard life |
| C．what they led a hard life | D．how hard a life did they lead |
There is _________ thing as a free lunch.
| A．not such | B．no such a | C．one such a | D．no such |