(2013·高考福建卷)The girl has a great interest in sport and ________ badminton classes twice a week over the last three years

The education of young is always hot and serious topic in modern society.

Can you learn English ________ chatting on theInternet

after thecyclist got missing, the search party found him in the bushes, _________.

It was not until she had finished all her work_______home tired