在R2624路由器发出的Ping命令中，“!”代表什么？（）

A、数据包已经丢失

B、遇到网络拥塞现象

C、目的地不能到达

D、成功地接收到一个回送应答

完成句子。(每空 1分，共 10分)

根据所给提示，完成句子。每空一词，含缩略词。

小题1:Li Lianjie set up an organization to help the poor．(改为否定句)

Li Lianjie ____________  ____________ up an organization to help the poor．

小题2:Some teenagers are playing computer games in the game hall．(对划线部分提问)

____________  ____________ some teenagers playing computer games，

小题3:Shall we go to the swimming pool?(改为同义句)

____________  ____________ going to the swimming pool?

小题4:当他醒来时，他妈妈正站在她身边。(完成译句)

When he ____________  ____________,his mother was standing close to him．

小题5:My father gave me a toy on my birthday．(改为被动句)

A toy ____________  ____________ to me by my father on my birthday．