Not until he retired from teaching three years ago having a holiday abroad.
| A．he considered | B．he was considered |
| C．had he considered | D．did he consider |
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 |
According to China's Food Safety Law, ______________ in February 2009, the State Council established the Food Safety Committee to oversee a chain of departments.
| A．as is passed | B．as it was passed |
| C．which is passed | D．which was passed |