You should have put the milk in the ice box. I expect it  ___undrinkable by now.

A．became

B．had become

C．has become

D．becomes

正确运行榜样示范法时的基本要求是（）

A.重视榜样示范

B.家长亲自给孩子树立榜样

C.借助于革命领袖、英雄模范人物影响孩子

D.引导孩子向幼儿园的老师和同伴学习