下面语句表述不正确的是:    (    )

①依法治国的本质是保证人民行使当家作主的权利，维护人民当家作主的地位

②汉字的出现是人类进入文明时代的标志

③依法治国的核心是依宪治国    

④法律是道德的基础，道德是法律的保障

A．①②

B．①②③④

C．①②④

D．③

I'll never understand how it ___  that you were late for class four times within a week !    [ ]

A. came out                        

B. came across    

C. came about                      

D. came into being