Seeing my fellow donors honoring their own commitments, I realized why I was there. I lay back in my donor chair, ready to make a difference in the life of someone I would never 7 . To be honest, I'd never really thought about why I donate. I just do it. But a few months ago, during one of my 8 donations I learned that my blood was specifically for a cancer patient and for a newborn baby—both patients needed what I would give in order to live. I've viewed my visits to the blood center 9 ever since.
My wife Karen is a 10 ， too. And more importantly, she has been on the bone marrow(骨髄) list for fifteen years, ever since she signed up to provide bone marrow to a kindergartner with leukemia(白血病). That little girl died before Karen's bone marrow could help her, 11 Karen was called again recently. Her test results were still on file, and it turned out she was a potential 12 for someone else. The caller asked Karen if she would still be willing to become a bone marrow donor. “Yes，” she said and then immediately began answering questions on the pages of paperwork for further testing. It was a race 13 time.
I wish I could say that this 14 was won. It wasn't. The caller later thanked Karen for her participation and asked a few more questions—including whether or not she'd 15 on the donor list. “Of course，” Karen answered.
Last week Karen gave blood and next week I'll make my usual donation. I'll 16 an afternoon from my schedule and make an appointment. I don't know whose life my donation may 17 . Most likely it will be a 18 ， but on any day the person needing a blood product could be you or me or maybe a loved one. It is worthwhile to 19 our time to donate.
I really do feel 20 every time I donate. And I like the feeling.
语篇解读：本文通过作者志愿参加献血的活动告诉我们：你献出
的每一份小小爱心，都可能有大影响。
1．A.appointment C．meeting
B．class D．flight
[解析] 考查名词。根据下文可知我要去参加献血活动。所以可知句意：下大雪了，但我的约会没取消。A.“约会”；B.“课，班级”；C.“会议”；D.“飞行”。故选A。
[答案] A 2．A.secret C．shape
B．balance D．word
[解析] 考查名词。因为下着大雪我还是去了，所以说我是冒着生命危险遵守诺言。固定短语keep one's word(遵守诺言)。A.“秘密”；B.“平衡”；C.“形状”；D.“话”。故选D。
[答案] D 3．A.service C．blood
B．shopping D．care
[解析] 考查名词。因为要献血，所以到达的是血液中心。A.“服务”；B.“购物”；C.“血液”；D.“关心”。故选C。
[答案] C 4．A.alone C．late
B．welcome D．lucky
[解析] 考查形容词。句意：当我到达那里时，我发现我不是一个人，还有几个人也来献血了。A.“独自”；B.“欢迎的”；C.“迟的”；D.“幸运的”。故选A。
[答案] A
5．A.exposed C．applied
B．attached D．added
[解析] 考查动词。句意：另外四个英雄已经躺在捐赠者的椅子上，他们的血管上系着线。A.“揭露”；B.“附上”；C.“应用”；D.“加”。故选B。
[答案] B 6．A.examine C．collect
B．produce D．clean
[解析] 考查动词。句意：机器静静地抽走并且收集着他们的救命礼物——血液。A.“检查”；B.“生产”；C.“收集”；D.“清理”。故选C。
[答案] C 7．A.meet C．miss
B．forget D．recognize
[解析] 考查动词。我献血也许会帮助某个我以前从未谋面的人。A.“遇见”；B.“忘记”；C.“错过”；D.“认出”。故选A。
[答案] A 8．A.regular C．special
B．unexpected D．pleasant
[解析] 考查形容词。句意：几年前，在一次意外的献血中，我了解到我的血液是专门给那些癌症患者和新生儿使用的。A.“常规的”；B.“意外的”；C.“特殊的”；D.“高兴的”。故选B。
[答案] B 9．A.wisely
B．differently
C．hesitantly D．carefully
[解析] 考查副词。句意：自从那时起，我就用不同的方式看待血液中心。A.“明智地”；B.“不同地”；C.“犹豫地”；D.“小心地”。故选B。
[答案] B 10．A.receiver C．patient
B．doctor D．donor
[解析] 考查名词。根据下文说她是在捐赠骨髓的名单上，可知句意：我的妻子一直都是一个捐赠者。A.“接受者”；B.“医生”；C.“病人”；D.“捐赠者”。故选D。
[答案] D 11．A.or C．and
B．but D．for
[解析] 考查连词。句意：那个小女孩在凯伦的骨髓可以帮助她之前就死了，但凯伦最近又被叫到了。因为她的骨髓还能帮到其他人。A.“或者”；B.“但是”；C.“和”；D.“因为”。故选B。
[答案] B 12．A.risk C．match
B．customer D．partner
[解析] 考查名词。句意：她的测试结果还在档案里，并且结果证明她仍然是一个潜在的匹配者。A.“风险”；B.“顾客”；C.“匹配者，比赛”；D.“搭档”。故选C。
[答案] C 13．A.beyond
B．with
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