The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Asia has achieved more in controlling the bird flu than Europe in the past few years, _______ the number of people infected with the virus is going up sharply.
He does so little work in the office that for all practical purposes it would make no difference _______ he didn’t come.
— May I go and play with Dick this afternoon, Mum?No, you can’t go out _______ your work is being done.
— What should I wear to attend his wedding party?— Dress _______ you like.
_____ different life today is from _______ it was thirty years ago.