请根据所给的首写字母或汉语提示写出单词。 1. A stand-up comedian may make fun of an audience member, or he or she might decide to tell different jokes in r______ to the reactions of an audience. 2. This is one of the most o_______ (杰出的) paintings of the Renaissance period. 3. She wrote a book about her r_______ (不同寻常的) experience in South Africa, where she worked as a UN Goodwill Ambassador. 4. She presented the Queen with a bunch of flowers on b_______ of the students. 5. Each year, more and more people do _______ (志愿的) work to help the disabled, the poor and the elderly. 6. The desks and seats can be a_______ (调整) to the height of any children. 7. I understand that you often use the e_______ of the gymnast Sang Lan to show how people can find happiness even in difficult times. 8. Here are some nice presents. Take w_______ (无论哪个) one you like. 9. Everyone in the class was expected to p_______ in the food festival to welcome the year 2011. 10. Being a Goodwill Ambassador means that I visit countries where the UN o______ programmes to help people.