20. It is 　　　　Du Li and Pang Wei married 　　　　they knew they are the first Olympic champion couple in our country .

　　　　 A. until, that　　 B. not until, which　 C.　 until , when　　　 D. not until, that

19.――It is really a heavy snow in early winter.　

　 ――　　　 .

A. So is it　　 B. No, it isn’t　　 C. I couldn’t agree more　　 D. As is it .

18.――Jenny looks very happy. She 　　　have won the first prize in the spoken English competition .

――I guess so. She speaks English fluently as if she were an American.

A. should　　　 B. could　　　 C. might　　　 D. must

17. Housing sales are 　　　　in some of the hardest-hit markets.　

　　　　　 A. picking out　　 B. picking up　　 C. picked up　　 D. picked out　

16. 　　　hands with Obama ,the college students ,　　 in the first row , felt extremely　　 .

　　　　　 A. Shaking, seated, excited　　　 B. Shaken, sitting, excited

C. Shaken , seated ,exciting　　　 D. Shaking, sitting exciting

15. Most people will find it safe to surf the internet ______ they visit the illegal network .　

　　　 A. why　　　　 B. how　　　　　 C. unless　　　　 D. where

14. The famous scientist Qian Xuesen passed away in November, _______is really a great loss to our country.　

　　　 A. who　　　　 B. which　　　　 C. what 　　　　D. that