摘要:第一节:单项填空(共15小题.每小题1分.满分15分) 从每题所给的A.B.C.D四个选项中.选出可以填入空白处的最佳选项.21.Faced with a problem, you have to it first, and then try to find a solution. A.resemble B.substitute C.concentrate D.analyze

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