根据语境补全句子中的单词。
(1)I like _______________( 中国的)dancing.
(2)He_________________ (发明)this bicycle in 1839.
(3)He __________ (步行)to school yesterday.
(4)We ______________(吃)a watermelon yesterday.
(5)But he didn’t _____________(来)back.
(6)Lingling went to a shop and____________(买)a present.
(7)I ________(帮助)my mum yesterday.
(8)This girl won a gold ____________ (奖杯).
(9)Did you ______________(骑)your bike?
(10)What’s the __________________(麻烦事)?