Customers who already own a licensed software are automatically______to upgrade to the latest one for free.

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问题 Customers who already own a licensed software are automatically______to upgrade to the latest one for free.

选项 A、qualify
B、qualifies
C、qualification
D、qualified

答案D

解析 根据上下文语义,此处意为“顾客将获得升级资格”,这里需要填入的词可以与be动词are组成被动语态表达被动的含义,因此选动词qualify(使具有……资格)的被动形式(D)qualified。动词原形(A)和动词第三人称单数形式(B)都不能与be动词are搭配。名词(C)与主语customers位置重复,也不能选。
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