If we have a strong will, we can overcome any difficulty ______ it is.

He is fluent in English because he once stayed in London。 —Really ?How long ____ there ?

It ___________me half an hour to walk to school.

Persistence is a good quality and that’s ___ it takes to achieve your dream.

________ has Steven Spielberg produced an emotionally engaging movie, but he manages to get the hero’s image in every viewer’s mind as well.