（）Whenwerealizeyesterdayisgo

请选择DCBA1X.Y3v5d When we realize yesterday is gone forever, we find we are growing up ________.(u;n,T*a'P.~

A. little by little(u;n,T*a'P.~

B. step by step(u;n,T*a'P.~

C. one by one(u;n,T*a'P.~

D. side by side(u;n,T*a'P.~