19．If man's best friend is a dog，then who is a dog's best friend？That would be Rover，Glow，Ivan，or Raina．These four recently donated valuable pints （品脫） of blood to their fellow dogs．And they did it without having to travel far from home．They visited an animal bloodmobile （采血車）．
Similar to the Red Cross vehicles for human beings，the University of Pennsylvania's travelling veterinary （獸醫的） lab goes to where the donors are to make it easier．The bloodmobile makes weekly rounds through suburban Philadelphia and New Jersey．Kym Marryott，manager of Penn's Animal Blood Bank，said，"You don't really think about it until you actually need it．Just like us，dogs need blood too．"
However，not every dog can donate blood．The dogs are examined for health first．Dogs must have the correct blood type，weigh at least 55pounds and be younger than 8years old．About 150dogs participate in the program．Each donates three or four pints a year，which can help animals suffering from illnesses like cancer or an accidental injury like being hit by a car．One pint can save up to three dogs．
Sandy Lucas brought her 7-year-old black German shepherd，Raina，to the bloodmobile last week when it parked at a mall in Harleysville，Pennsylvania．The resident（居民）said she wouldn't have braved highway traffic and city parking problems to take the dog to Penn Vet's Animal Hospital in downtown Philadelphia，which is too far from her home．But the bloodmobile made it convenient to find out if Raina could donate．"I was very，very thrilled when I knew she had the right blood that was needed to help another dog out，"said Sandy Lucas．"We'll definitely do it again．"
Just like human beings，the donors （捐助者）get a snack and a heart-shaped"U of P Blood Donor"sticker immediately after giving．In addition，they receive free blood checkups and dog food to take home．
29．To bring convenience to the donors，the labA．
A．has bloodmobiles visiting the suburbs
B．is built where the donors are
C．goes to the homes of the donors
D．works with the Red Cross
30．How many factors should be considered when making donations？C．
A．Two．
B．Three．
C．Four．
D．Five．
31．The example of Raina is mentioned in the passage toB．
A．stress the importance of keeping pets
B．prove the value of bloodmobiles
C．tell readers that Raina is very brave
D．show how its owner felt then
32．After giving donations，the donorsA．
A．are offered a sticker
B．receive a free physical checkup
C．get a bag of free blood
D．feel very thrilled．
分析 本文屬于說明文閱讀，作者通過這篇文章主要向我們描述了狗獻血的故事，告訴我們狗也能通過獻血來幫助其它的同類．
解答 29．A．細節理解題．根據第一段最后一句及第二段第三行"The bloodmobile makes weekly rounds through suburban Philadelphia and New Jersey"可知為了給捐贈者帶來方便，實驗室設立了郊區采血車；故選A．
30．C．細節理解題．根據第三段第二句Dogs must have the correct blood type，weigh at least 55pounds and be younger than 8years old可知，參加獻血的狗必須符合四個條件：體檢合格、血型合規、體重達標（55磅以上）、狗齡不超（8歲以下）；故選C．
31．B．推理判斷題．根據倒數第二段Sandy Lucas所談I was very，very thrilled when I knew she had the right blood that was needed to help another dog out，"said Sandy Lucas．"We'll definitely do it again看出，她是在為采血車點贊，因為the bloodmobile給她家的狗Raina獻血帶來了方便，免除了堵車費時之煩；故選B．
32．A．細節理解題．根據最后一段the donors get a snack and a heart-shaped"U of P Blood Donor"sticker immediately after giving．In addition，they receive free blood checkups and dog food to take home得知，獻血之后，每條狗都能得到如下東西：a snack，a sticker，free blood checkups 和dog food；故選A．
點評 本文是一個科教類閱讀理解，題目涉及多道細節理解題，做題時結合原文和題目有針對性的找出相關語句進行仔細分析，結合選項選出正確答案．推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據．
