For some time now, world leaders _____ out the necessity for agreement on climate change, the world economy and African development．
| A．had been pointing | B．have been pointing |
| C．were pointing | D．pointed |
For Wang Shun，________ university graduate from China's less developed Guizhou Province，shopping online is ________ delight as she tries to keep pace with the lives of those in big cities.
| A．the；a | B．a；不填 |
| C．an；a | D．a；a |
The urge to go abroad for further study is strong, but it was not until last summer ________ I knew how powerful it could be.
| A．who | B．that |
| C．where | D．before |
Only when I put myself in their position ________ they were more miserable than me.
| A．I had known | B．had I known |
| C．I knew | D．did I know |
China added 50.9 million Internet users in 2012，________ the total to 564 million at the end of last year.
| A．brought | B．bringing |
| C．having brought | D．to bring |
French Foreign Minister Laurent Fabius on Monday ________ international support for his operation to help Mali quash Islamist rebels.
| A．called up | B．called for |
| C．called out | D．called in |