The lawyer representing the citizen's group challenged the state
goVernment's attempt to lease the toll road by demanding to know
the specific meaning of the word lease
想請問這句第三個字representing是現在分詞還是動名詞?
怎麼判斷?可以告訴我原因嗎??
另外要問challenged是甚麼意思?為何challenge這個字要加d?