甘肃省兰州第一中学2019-2020学年高一上学期期末考试英语试题

适用年级：高一
试卷号：660528

试卷类型：期末
试卷考试时间：2020/2/10

1.单项选择(共1题)

The book was written in 1946, ____ the education system has witnessed great changes.

A．when

B．during which

C．since then

D．since when

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试卷分析