综合天窗（施工）作业时，作业人员、机具、材料不得侵入上、下行两线间中心线。
参考答案：对
--- Tom, you haven’t finished your homework yet.
--- ______ ? There are two days before the new term starts.
A．Repeat
B．Once again
C．Sorry
D．So what
有时我真想与某人动手打一架。
A．是
B．否
