As a saying goes, the wise man knows he knows nothing, _________ the fool thinks he knows all.
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.
Tom studied very hard, and he wanted _______ to his chance to Learn.