While this arrangement was a major improvement over its ______, it still had dra

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问题 While this arrangement was a major improvement over its ______, it still had drawbacks.

选项 A、premium
B、prevalence
C、premise
D、predecessor

答案 D

解析 句子大意:虽然这次安排较——有很大的改进,但还是有缺陷。只有predecessor“前任,前辈;原有事物,前身”符合题意。因此本题选D。
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