题目

根据句意及首字母提示完成单词。【1】I o____________________________________ this morning and was late for class.【2】They are all dressed in national c____________________________________________________________.【3】I got to school too late and m______________________________________________________ the first class.【4】The news was a__________________________________________________________________ to the public on TV.【5】What he said is b__________________________________________.All of us believe him.如图，△ABC中，DE是AC的垂直平分线，AE=3cm，△ABD的周长为l3cm，则△ABC的周长为__________．