It was not until the early 1950s ______most tape recorders began using plastic tape as they do today.
Mother told Jim to watch the milk until it boiled and then _________ off the gas.
The idea puzzled me so much that I stopped for a few seconds to try to _______.
----Will you be ____ this afternoon , John?----It depends. I’ m afraid I’ll be called in by my boss.
Sarah had her purse stolen the day before yesterday when she was knocking about in a park, ______________?
He doubted, as did his family, ______________you were telling the truth.