Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.
___________of last term we ___________ over two thousand new words.
The little girl _______ go to the cinema rather than _______ at home alone that night.
Don’t try to cheat in the examination. You will never __________ it.
After the long journey, the three of them went back home,_________.
He an important part in putting out the fire.