摘要:第一节:语法和词汇知识(共15小题.每小题1分.满分15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.并在答题卡上将该项涂黑.21. Statistics indicate that unemployment has caused over 70 percent of low-income residents to live in poverty. A. the ; the B. an ; the C. \ ; a D. \ ; \

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