Peoplealwaysthinktha的精選

問題詳情：根據上下文意思，完成缺詞填空。 Peoplealwaysthinkthatconcert(音樂會)isakindofelegantart.Musiciansalwaysplaytheirmusicalinstrumentsinaconcerthall.Thesehallsarealwaysb1___   andclean.Manypeople...