共用题干
Mind Those Manners on the Subway
So,there you are,just sitting there in the subway car,enjoying that book you just bought ______(46) Or , the person sitting next to you takes out a nail clipper（指甲刀）and begins cutting his or her nails.
Annoying? Many of us have to spend some time every day on public transportation.
______(47)So,to make the trip more pleasant,we suggest the following:
Let passengers get off the bus or subway car before you can get on.______(48)
Stand away from the doors when they are closing.
Don't talk loudly on a bus or subway.Chatting loudly with your friends can be annoying to others.______(49)
Don't think your bags and suitcases（手提箱）deserve a seat of their own.
Use a tissue whenever you cough or sneeze（打喷嚏）.An uncovered sneeze can spread germs （细菌）, especially in crowded places.
Don't cut your nails or pick your nose on public transportation. Don't read over other people's shoulder.______(50)It can make people uncomfortable.They might think you're too stingy （小气的）even to buy a newspaper. Or they might think you're judging their behavior.
______(49)
A: Don't eat food in your car.
B: Don't shout into your mobile phone on a bus or subway.
C: We all know that some behaviors are simply unacceptable.
D: Many people do this on subways,but it's really annoying.
E: Getting off and on in an orderly manner can save time for all.
F: Suddenly,you feel someone leaning over your shoulder reading along with you.

共用题干Mind Those Manners on the Subway
So,there you are,just sitting there in the subway car,enjoying that book you just bought. _________(46) Or, the person sitting next to you takes out a nail clipper（指甲刀）and begins cutting his or her nails.
Annoying?Many of us have to spend some time every day on public transportation_______
(47)So,to make the trip more pleasant,we suggest the following:
Let passengers get off the bus or subway car before you can get on.________(48)
Stand away from the doors when they are closing
Don't talk loudly on a bus or subway.Chatting loudly with your friends can be annoying to others.________(49)
Don't think your bags and suitcases（手提箱）deserve a seat of their own.
Use a tissue whenever you cough or sneeze（打喷嚏）.An uncovered sneeze can spread germs（细菌）,especially in crowded places.
Don't cut your nails or pick your nose on public transportation.
Don't read over other people's shoulder._________(50)It can make people uncomfortable. They might think you're too stingy（小气的）even to buy a newspaper. Or they might think you're judging their behavior. ________（50）A:Don't eat food in your car.B:Don't shout into your mobile phone on a bus or subway.C:We all know that some behaviors are simply unacceptable.D:Many people do this on subways,but it's really annoying.E:Getting off and on in an orderly manner can save time for all.F:Suddenly,you feel someone leaning over your shoulder reading along with you.

据《星期日商报》报道，2月4日，英国航空航天部在对包括通讯卫星在内的一切通讯情报设施进行检测中，忽然发现军用卫星“天网”系统的一颗卫星不是拒绝接受信号，就是反应迟钝。当天，英国航空航天部组织专家研讨，就在这时，忽然来了一封电子邮件，声称他们劫持了“天网”卫星!
电子邮件称，一个黑客团体已经控制了“天网”卫星。他们是一群由电脑专家、密码专家和航空航天专家组成的团体。他们并不想搞破坏活动，由于经费不足，目前急需资助。他们成功地窃取了一颗“天网”卫星的资料，并对它进行遥控，切除了它和航天部的联系，改变卫星飞行的轨道。英国政府如果要收回卫星的控制权，必须交出赎金，否则他们就要把这颗卫星变成废铁。
由于英官方并没有公开澄清此事，所以一时间小道消息满天飞。虽然有人强调“天网”系统是封闭的系统，不可能由Internet入侵，但事实上，控制卫星的微波是开放的，截获卫星信号，夺取卫星控制权并非天方夜谭。一套信号发射系统只需要两只手提箱就可以装下，它们可以在任何地点被组装起来。而不间断地截获卫星信号，许多大学里的卫星天线就可以做到。所以单从技术上讲，“俘虏”卫星并非不可能。
“信息战争”一直被认为是一个“预言”，人们都相信它的可能性，但没有人知道它来得究竟有多快。据报道，1990年海湾战争中，美军曾经利用藏在打印机里的病毒破坏伊拉克的防空系统。俄罗斯卫星专家伊万诺夫·塔里夫说：现在争论“劫持卫星”事件的真实性已经没有意义，这条消息可以提醒各国政府，黑客已经开始对军事设施展开攻击。
弹出材料
前两段的综合要义是：
A英国航空航天部发现军用“天网”系统的一颗卫星不是拒收信号，就是反应迟钝
B一个黑客团体已经控制了英国“天网”系统中的一颗卫星，并想将它变成废铁
C一个黑客团体想获得赎取经费，已挟持了“天网”系统中的一颗卫星
D英国政府如不交出赎金，“天网”系统中的一颗卫星将会变成废铁