When did the couple die? —- It was on May 12 _______ the earthquake hit Wenchuan County

Have you known each other for long- Not really. ________ we started to work in thisschool.

________ that the government will lead them out of the financial crisis, people are now ________ to the development of economy.

The science of computer,____ rapid progress has been made, is the most important of all.

Nanjing is about 300 km ________________ Yancheng.