某建筑公司承接某工业厂房。基础大体积混凝土采用矿渣硅酸盐水泥拌制，施工方案采用全面分层法，混凝土浇筑完成后14h，覆盖草袋并开始浇水，浇水养护时间为7d。浇筑过程中采取了一系列防止裂缝的控制措施。

本基础工程混凝土养护时间不得少于( )d。

A．14

B．28

C．7

D．21

The two men who had drunk too much stood ________ at each other on the road as if they were very angry with each other.

A．staring

B．laughing

C．glaring

D．smiling