It’s said that the early European playing-cards for education.
A. have designed
B. were designed
C. have been designed
D. were being designed
网友回答
A. have designed
(答案→)B. were designed
C. have been designed
D. were being designed
解析：句意：据说，早期的欧洲人设计扑克牌的初衷是用于教育。“设计扑克牌”是发生在过去的事情，故用一般过去时，且“扑克牌”和“设计”之间是被动关系，故用被动语态，选B。