－Excuse me, does Mr Smith son live here －He used to_______ here, but he gets used to ______ in a modern city.

We have done things we ought not to have done and_____ undone things we ought to have done

How can you so cold and calm after such a hot argument?

The Blacks have two children,but they would like tohave ______child.

______do you improve your listening — I improve it ______watching English movies.