About ___ of the teahers is our school ___ young people under thirty.

 These stories are about the everyday life of ordinary people who         the great dangers in China over the past few years.

There is no doubt_______ English is the widely used language all over the world.

After about one hour of the play between China and Korea, the ______ was 3-2 in our ______.

A qualified doctor has to constantly update his knowledge in order to maintain his professional _____.