【推荐1】The story happened in 1769, ____________ there was a war between the two countries. (用适当的词填空)

【推荐2】He came to public attention during the 1960 Rome Olympics, _______ he won the light heavyweight gold medal for the USA, _________(demonstrate) great talent and personality in the process. (用适当的词填空)(所给词的适当形式填空)

【推荐3】Acupuncture is a Chinese medical treatment ________ a history of about 4,000 years, which __________(probable) dates back to the Stone Age, _____stone tools called bian were used to press areas of the body. (所给词的适当形式填空)