摘要：第一节 多项选择(共10小题,每小题1分.满分10分) 从A.B.C.D四个选项中.选出可以填入空白处的最佳选项.21．The moment we heard the news of the earthquake, we began to the work to rescue those who were trapped in the building. A．set off B．set down C．set aside D．set about

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