Has the train arrived yet?—No, it ought to ___ twenty minutes ago

The invention of steam engine greatly sped up the industrial revolution, which _____ a lot to the take-off of the world.

Have you heard that Tom was given a good beating by his father last night?—He _____ it. He was making trouble everywhere all the time.

He ______ his things and left for Shanghai.

When Peggy turned 40, she invited 40 friends to help her _____. [ ]