题目

 Never before in our country_____.        A. has such a thing happened           B. such a thing has happened      C. has so a thing has happened          D. so a thing has happened 答案：【解析】A 考查倒装句和so,such的辨析。当never,little hardly,scarely等否定意义的副词置于句首句子要倒装。So+adj/av+n.而such+a（n）+adj.+n

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