问题
选择题
.It is said that the early European playing-cards ______for entertainment and education.
A．were being designed
B．have designed
C．have been designed
D．were designed
答案
答案：C
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.It is said that the early European playing-cards ______for entertainment and education.
A．were being designed
B．have designed
C．have been designed
D．were designed
答案：C