The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Obama, _______ life was once hard when he was young, were elected President of American.
Was it in the waiting room ______ only allows mothers-to-be to enter that you lost your wallet?
The Beatles, ________ many of you are old enough to remember, came from Liverpool.
Women _______ drink more than two cups of coffee a day have a greater chance of having heart disease than those ________ don’t.
If a shop has chairs __________ women can park their men, women will spend more time in the shop.