21.C细节理解题。根据 The Saga balloon Festiva一节中“ More than100 balloons from about20 countries tookpart in the annual five-day competition and celebration in Saga, Japan,in2019.”可知,有100多个气球参加了2019年的Saga气球节。
22.A细节理解题。根据 The Leon Balloon Festival一节中" It is now the biggest balloon festival in LatinAmerica.”可知,Leon气球节是拉丁美洲规模最大的