My English-Chinese dictionary has disappeared. Who _____ have taken it?
She has good eyesight. She can see ____ the distant island in the sea.
It is obvious that water is to be _____to the development of life.
He has behaved in the most extraordinary way recently. I wonder what can_____ his actions.
Used to TV shows, where everything is quick and amusing, many people do not have ____ to read a book that requires thinking.
Washington, a state in the United States, was named _____ one of the greatest American presidents.