The government should develop          system to predict when wildfires occur andgive warnings in time.

From his         look, we could see the boy was         of the stranger.

Japan's first lady said Wednesday she would not marry Premier Naoto Kan again in ______ life.

 --Don’t smoke any more, Ralph ! It is very bad for your health ! --I know I should give up smoking, but ________.

        to his scientific research, the professor cared little about his family.