2. What is the most important feature of the backpack invented byLawrence C.Rome
and his colleagues？
A It produces electricity forelectronic devices while the wearer walks.
B It can be used as cellphones，GPS in the military actions or field studies.
C It is small andconvenient.
D It is light and easy to carry.
3. The word “springs” inParagraph 3 means
A a small stream of water flowing naturally from theearth.
B the season of the year，occurring between winter and summer.
C the act or an instance of jumping or leaping.
D a length of metal woundaround，which returns to its original shape after
being pushed.
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.
答案與題解：
1.C第一段告訴我們，因為背包可以裝許多東西，所以可以將雙手解放出來做其他事情：tofree your hands to do other things.
2.A第二段的第一句說，Lawrence C.Rome及其同事們發明的這種背包，當背著背包走路時，會有電能產生；該段最后一句告訴我們，背包的這種性能可減少背包的重量，因為不必攜帶備用電池。
3.D “springs”在此是彈簧的意思。spring是一個多義詞：泉水（A）、春天（B）、彈跳（C）。
4.B 第四段最后一句的意思是：Rome計劃將這種背包商業化，即推向市場。A、C、D在文中均未提到。D的意思是為背包做廣告。
5.B這個句子的字面意思是：如果你終于得到這樣的背包，過馬路時一定要兩面都看看。也就是說，不要因為同時玩著游戲，聽著音樂、看著電視，太專注以致不注意來往車輛了。