单项选择题
A．their brains could not function efficiently any more B．the full development of both sides of their brain was achieved C．their bodies stopped working D．they were very old
A．collect B．pile C．raising D．increase
A．when I have power, I will have happiness B．being a boss is more important than feeling happy C．when I become a boss, I will never search for happiness D．boss and this thing mean the same to boss and I