You may not understand what they have done, because they ____ a younger generation.
She went to the bookstore and bought _______.
An interesting suggestion for measuring the atmosphere around the Mars has been put _______.
_______, did you see the teacher off?
George is going to talk about the geography of his country, but I’d rather he _______ more on its culture.
He suddenly saw Sue _______ the room. He pushed his way _______ the crowd of people to get to her.