When our university laboratory bought this microscope we were given a one year’s ______.

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问题 When our university laboratory bought this microscope we were given a one year’s ______.

选项 A、reservation
B、security
C、proof
D、guarantee

答案D

解析 reservation:保留,(旅馆房间等)预定,预约;security:安全;proof:证据,试验,考验;guarantee:保证,保证书,担保,抵押品,此处指的是保修一年,因此正确答案是D。
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