—Why didn’t you come to Mike’s birthday party yesterday?
—Well, I _____, but I forgot it.
| A．should | B．must | C．should have | D．must have |
Had it been possible, I would have gone to attend Monica in the hospital, but I________ fully occupied last month.
| A．had been | B．was | C．am | D．have been |
When asked what original intention led them to volunteer, about half of___ said they were willing to devote themselves.
| A．whom | B．whose | C．them | D．who |
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 |