Mandy is good at dancing.Lily is good at dancing,too.【合并句子】 题目:填空↓↓↓↓↓↓( )Mandy( )Lily are good at dancing.在线等,挺急的!各位大佬救救我吧,英语老师超超超超超凶QAQ,就没见过她那么凶的(ಥ_ಥ)