________ is surprising to us is that Tom, for _______ English was once boring, can speak English fluently as though he were a native speaker.

It doesn’t matter ________ you take it seriously, for _______ matters is that he can realize it.

_______ caused the accident is still a complete mystery.

       thousands of families from the earthquake-stricken area have moved into new houses is exciting news.

It remains a question_______we can finish the project in such a short time.

    is known to us all is that the 2012 Olympic Games will take place in London.

_____ his dream of going to college will come true is uncertain.

It never occurred to me _____ you could succeed in persuading him to change his mind.

      we’ll have our sports meet this week       the weather.

It is still under discussion _________ the old bus station should be replaced with a modern hotel or not.