--What is the matter with you?--I caught cold and had to stay in bed.
Professor Smith told me that the book was well worth ________.
He was about to tell me the secret _________ someone patted him on the shoulder.
The bird was lucky that it just missed __________ .
Tom found out his parents weren’t well, so he went back to _____ for a while.
He is ________ a friend to me; he is in a way my English teacher.