The manager was worried about the press conference his assistant ________ in his place but，luckily，   everything was going on smoothly.[ ]

A．gave  

B．gives

C．was giving  

D．had given

青年期自我意识发展的表现为（）。

A．关注自己的外貌

B．关注自己的人格

C．发现自我、关心自我的存在

D．一系列关于“我”的问题反复萦绕于心