2017 年北京高三一模六城区英语完形填空专项练习题完形填空（共 20 小题；每小题 1.5 分，共 30 分）阅读下面短文，掌握其大意，从每题所给的 A、B、C、D 四个选项中，选出最佳选项，并在答题卡上将该项涂黑。海淀A Commitment to LifeThe snow was falling and the roads had become dangerous. The schools were dismissed early,but much to my surprise , my36wasn’t canceled. So I went, feeling especially heroic. Asfar as I could see, I was risking my life to keep my37. Snow or no snow, I would be ontime for my scheduled donation at the local38center.When I got there, I discovered I wasn’t39. Four more ―hero-types‖ were alreadylying back in donor chairs with lines40to their veins, and machines quietly pumpingaway to41their lifesaving gifts.Seeing my fellow donors honoring their own commitments, I realized why I was there. I layback in my donor chair, ready to make a difference in the life of someone I would never42.To be honest, I’d never really thought about why I donate. I just do it. But a few months ago,during one of my43donations I learned that my blood was specifically for a cancerpatient and for a newborn baby—both patients needed what I would give in order to live. I’veviewed my visits to the blood center44ever since.My wife Karen is a45, too. And more importantly, she has been on the bone marrow(骨髓) list for fifteen years, ever since she signed up to provide bone marrow to a kindergartnerwith leukemia(白血病). That little girl died before Karen’s bone marrow could help her,46Karen was called again recently. Her test results were still on file, and it turned out she was apotential47for someone else. The caller asked Karen if she would still be willing tobecome a bone marrow donor. ―Yes,‖ she said and then i...
