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It is said that the early European playing-cards ______ for entertainment and education.
A.were designedB.have designedC.have been designedD.were being designed
A

试题分析:这个句子中,it是形式主语,后边that引导了一个主语从句,主语从句中主语the early European playing-cards与动词design之间是被动关系,且是发生在过去的事情,故用一般过去时的被动语态,故选A。
点评:英语中的时态主要由动词的形式来表现,因此在学习英语时态时,要注意分析动词形式及具体语境,想象在那个特定的时间动作所发生的背景,这个动作是经常性动作、一般性动作、进行性动作、完成性动作还是将要发生的动作。语态主要是看动词与主语之间的关系。
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