One       to the accident said that the car was racing at full speed and that the driver appeared to be drunk.

Mo Yan's winning of 2012 Nobel Prize shows the world's________of China" contemporary literature.

As a heavy smoker , he finds it hard to get rid of the habit, which has a bad _____on his health.

As second-hand smoking is more harmful and dangerous, people want a total _____against smoking in public．

All that can be done ____.