At the conference, people of different _______ were given a chance to exchange theirs with each other.
Many traditional customs have _____ because they are out of date.
As we all know, giving up smoking can _____ the risk of dying of heart disease.
Take your umbrella with you and it can _____ in the rain.
-Why is Tom so worried? -Because he doesn't know _his shop.
By the time he was 12 years old, he_______ threedifferent languages.