Ⅰ、1、leaves 2、to dance 3、more difficult 4、quickly 5、interested 6、buy 7、themselves 8、closed 9、to brush 10、fifth Ⅱ、1 - 5 B D B B B 6 - 10 B B D D B Ⅲ、 1、In order 2、can't；either 3、what to do 4、As a result

Ⅰ、1、leaves 2、to dance 3、more difficult 4、quickly 5、interested 6、buy 7、themselves 8、closed 9、to brush 10、fifth Ⅱ、1 - 5 B D B B B 6 - 10 B B D D B Ⅲ、 1、In order 2、can't；either 3、what to do 4、As a result