The boy lost his key, so he has no choice but till his mother came home.
I don’t like to ask people for help as a rule but I wonder if you could ______ me a favour.
The boy’s new bike is _______ envy of his friends.
I’d rather have a room of my own, however small it is, than _______ a room with someone else.
________ he had not hurt his leg, John wound have won the race.
E-mail, as well as telephones, ________ an important part in daily communication.