4. According to Paragraph 4，what does Rome plan to do?

　　A To make the backpackmore comfortable for the wearer.

　　B To put the backpack on the market.

　　C To test the advantage of the backpack.

　　D To promote the backpack in anewspaper or on television.

　　5. What is implied in “if you do get oneeventually，just make sure to took both

　　ways before crossing the street！”?

　　A You will be too excited to watch the traffic.

　　B Enjoyingelectronic devices while walking may invite traffic accidents.

　　C It is notpossible for you to get such a backpack.

　　D It is wise of you to have such abackpack.

　　KEY：CADBB