根据首字母或所给中文提示，写出正确的单词完成句子。
1. The headmaster excitedly a____________ the school sports meeting began.
2. Obama is a good speech maker and his first speech as president made a strong i_________ on his
audience.
3. The farmers in this area had a good harvest last year thanks to the s________ farming.
4. His friends were ___________________(热情)and encouraged him to publish his ideas.
5. Berlin sounds fascinating from your ____________________(描述).