Until the ninth century, written words were not actually separated,____in some literary writing, dots or points were used to indicate divisions.
(A) in spite of
(B) contrary
(C) contrast to
(D) but
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答案：D
测试点：连词.
分析：空格两边都是完整的句子，中间应有连词将其连接．答案(D)为表示转折的连词．(A)，(C)为介词性质，(B)为形容词，均不可连接句子。