It is said that the early European playing-cards ______ for entertainment and education.
问题描述：
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
但是design发生在it is said 之前为什么不用完成时呢?
答
it is said 是现在时,据说的意思,指现在说的,而在宾语从句中描述的是过去发生的事情,所以用一般过去时,没有完成时的概念.
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有不明白的请继续追问(*^__^*)sb is said to have done =it is said that sb did 是这样么？可以这么理解，意思都是据说某人原来做过某事