The president spoke at the business meeting for nearly an hour without ____ his notes.
--- Shall I take a message for you? --- _____.
John’s success has nothing to do with good luck. It is years of hard work _____ has made him what he is today.
We were about to go out for a walk ________ it began to rain.
_____ you’ve got a chance, you had better make full use of it.
Sam _____ some knowledge of the computer just by watching others working on it.