—Who is the old man talking with your teacher? —I don’t know. I _________ him before.
She has been teaching in a school since she graduated,so she is not ______ to associating with business people.
______the fact that his first experiment had failed,Prof. White stuck to his research.
Robert wishes that he ________ business instead of history when he was in university.
If he _________ me tomorrow, I would let you know.
The project _______ helping young unemployed people.