第4题用suddenly还是sudden?why?

第4题用suddenly还是sudden?why? 这个题目用suddenly还是sudden. (sudden) sound sudden要改成suddenly吗 suddenly是sudden的什么形式 _____,a monster appeared .(Sudden/Suddenly) suddenly和All of sudden 有什么区别? suddenly除了等于all of a sudden 还等于什么? The old man died last night sudden.为什么得用suddenly而不是sudden why suddenly call bear bear why to birds suddenly appear I was so nervous and suddenly … 为什么这里的 sudden用副词啊? 英语翻译Why do birds suddenly appearEvery time you are nearJust