Many approaches have been to control the spread of H7N9 Bird Flu.

Wendy is a ____ dancer. She dances very ____.

______ young people see and hear in themedia helps them to figure out how the world works

Attention, please. The plane has to be _________ because of the foggy weather.— Oh, bad luck! We have to wait now.

This summer vocation I am going to do a lot of _________ to prepare for the senior high school.