Directions : Gap fillingextraordinary；obscure； decay ；candidates; underwent；sake ； altered ； abuses; budget ; accelerated1. He _______a lot of hardships in his childhood.2. I used to________ the unusual usage, but now I'm not used to doing so.3. We can't risk big things for the _______ of small ones.4. Sugar can _______ the tooth.5. The joke did not ________the underlying seriousness of his point.6. He has already lived an ________ life.7. When I returned to my hometown ten years later, little had ________in the city.8. The tall boy is one of the ________ in this election.9. That truck suddenly __________to keep up with my car.10.More and more families begin to worry about the new educational _________.