【母题来源】【2016·北京】
【母题原题】
【2016·北京】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，并在答题卡上讲该项涂黑。
A Race Against Death
It was a cold January in 1925 in North Alaska. The town was cut off from the rest of the world due to heavy snow.
On the 20th of that month, Dr.Welch 36 a Sick boy, Billy, and knew he had diphtheria, a deadly infectious(传染的)disease mainly affecting children. The children of Nome would be 37 if it struck the town. Dr.Welch needed medicine as soon as possible to stop other kids from getting sick. 38 , the closest supply was over 1,000 miles away, in Anchorage.
