Obama, _______ life was once hard when he was young, were elected President of American.
Tell Mary that there's someone_______for her at the door.
Anything worth ______ is worthy of ______.
---Will the Smiths go abroad this summer? ---No, they finally decided _______ .
The patient was warned _______ oily food after the operation.
Charles Babbage is generally considered _______ the first computer.