Obama was elected ____ first black president of the United States four years ago and has been elected _____ president again for the next four years.

As everybody knows, Hong Kong used to be _____ part of _____ British Empire．

For Chinese,2008 is ______special year, ______ year when the 29th Olympics were held in China for the first time and ______ one that saw so many natural disasters.

Chinese culture has become ________ interest for people all over the world since the Shanghai Expo and many foreigners are discovering ________ history of China.

—Would you mind giving your advice on how to improve our business management?—If you make _____ most of the equipment, there will be _____ rise in production.