Do you know who____(be) the first man to walk on the moon?是按照叙事那样用was呢,还是按照不变的事实来用is?

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Do you know who____(be) the first man to walk on the moon?是按照叙事那样用was呢,还是按照不变的事实来用is?
Do you know who____(be) the first man to walk on the moon?
是按照叙事那样用was呢,还是按照不变的事实来用is?

Do you know who____(be) the first man to walk on the moon?是按照叙事那样用was呢,还是按照不变的事实来用is?
用was

应该是was吧
不过我也不敢肯定,我们老师说在没有时间状语的情况下一般当作已经发生过了的·· 囧

was
将do you know 看成是插入语