成年早期的人们体力和精力均处于“鼎盛时期”，他们能承担繁重的脑力和体力劳动，能为社会做出较大的贡献。
参考答案：对
At that very moment my mind went completely _________ and I forgot what I was supposed to be doing.
A．efficient
B．abundant
C．shallow
D．blank
