This ____ my brother and those ____ my friends.

In 2001 the Chinese people were always in high spirits, for pieces of exciting news came to China________[ ]

n environment can help the city bid for the Olympics, which____ will promote its economic development

h ASEM Summit, held in Laos in November 2012,was aimed at developing Asia-Europe cooperation to worldeconomic growth

He is _____ careless a student that heoften _____ some letters while writing.