By the time he was twelve, Edison _______ to make a living by himself.
Many grownups ________ challenging conversations with their children later this month to help them recover from the panic.
Linda felt someone ________ on her way home from work yesterday evening, and therefore she was frightened and looked back from time to time.
I ________ up to $5 000 by the time the new term begins in September.
—What happened to Bill?—He ________ really fast when suddenly he ran into a parked car.
I thought the teacher would say something about our exam result but he ________ it.