ICMP工作在( )层，是一种管理协议，用于在IP主机、路由器之间传递控制消息和差错报告。

单句改错。

( )1.I'm  used  to   live   in the country  now. 

           A         B           C       D

(     )2. The teacher told  us that  light  traveled   faster thansound.

                               A         B                C                  D

(     )3. They  says  they will go  there   by  the plane.

                      A                   B    C        D

(     )4. The  patient’s  family  are  watching the operation with video.

                       A                     B       C                                D

(     )5. The policeman prevented the children  not to play  football  on the busy road.

                                                              A             B             C                D