In the reading room, we found her at a desk, with her attention _____ on a book.
_______the early train,you'll have to get up early and rush in a taxi.
The_______waiter came up to us and said,"You are welcome."
There is a big dog_______to a fence outside the house.
Tell Mary that there's someone_______for her at the door.
Anything worth ______ is worthy of ______.