【单选题】Mr Zhang _______ his cap and sat down as soon as he entered the room. [ ]
【单选题】He always took a notebook with him _________he could take down something important at all times and all places.
【判断题】()设置完计算机的工作组与1P地址后,而要重启系统才能生效
【单选题】He was homeless, so we took him ____.