There are several research centers in China ________ a certain disease called Bird Flu is being studied. 

 — If our government _____attention to controling food safety now, our health _____in danger.

However,　　　　 happened later proved me wrong.

______ around the Water Cube , we were taken to see the Bird’s Nest for the 2008 Olympic Games.

 At the beginning of a speech, it is very important to grab the audience’s attention and make them interested in     ________you have to say.