It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.

(2014·湖北重点中学联考)His contribution to the boy’s welfare was to________him for the world in which he would live.

Although they are at the same university, the boy spends _______ money as the girl every month. 

Even if you have had a big dinner, ___ are that you will still want to reach for food when it gets late．

Wind is now the world’s fastest growing ________ of power.