A stupid man tells a woman to shut up, while a wise man tells her that her mouth is quite beautiful it is closed.

Leaders of the BRIC countries—–Brazil, Russia, India and China—-_______their second summit on FridayPresident Hu Jintao then returned home to help direct relief work ______the deadly earthquake in Qinhai

Smoking, ____ some smokers, might ease their anxiety sometimes, but ____ the addiction caused by their constant practice, it is really hard to give up.

People should be cautious ______their personal information when surfing the Internet so as to prevent certain computer viruses ______ it.[ ]

_____ is known to all, paper was first made in China.