It was        Asimov was eleven years old        his talent for writing                        became obvious.

Was it at the school ______ was named after a hero _____ he spent his childhood?

I really don’t know ________ I had my money stolen.

It was his belief ______he would one day find his lost child ______ inspired him never to give up.

---You know Jane?
---Yes, it was _____ I surfed the Internet last week.

It was only when I fully understood the poem       to appreciate its beauty.

It was 80 years before Christopher Columbus crossed the Atlantic______ Zheng sailed to East Africa

It was _______ you had done _______ made it possible for you to improve your English.

It was not until 1938 _________ the first colour TV programme was broadcast.

It’s exactly ______ we do ______ has changed the world.