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 guarantee商品使用保证。

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Whenouruniversitylaboratoryboughtthismicroscopeweweregivenaoneyear’s