1.The setting____________(check)just now.2.Where _____silk_______(produce)?3.When _____this story______(take)place?Not long ago.

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1.The setting____________(check)just now.
2.Where _____silk_______(produce)?
3.When _____this story______(take)place?Not long ago.

你们俩学没学过英语?误人子弟!
checked 因为just now是过去式标志
was produced 被动语态,因为丝绸是已经制作完了,所以be动词用的was
did take take place 是发生 很明显是过去式 所以用did