1. He apologized for the (convenient)____ he had caused. 2. For your (inform)___, the library is on the third floor. 3. This is one of the best (document) ____films showing the lives of working people. 4. The government has introduced some (effect)____ measures to reduce unemployment. 5. He is a (curiosity)___boy. He is always asking questions. 6. There is a large ____ of animals that live in Nairobi National Park. (vary) 7. We can't clean up our___ rivers and seas. (pollute) 8. The earth is being___ and the future looks bad. (threat) 9. His___ is still uncertain;he has been seriously injured. (survive)