What do they do last night为啥do不用过去式

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What do they do last night为啥do不用过去式
What do they do last night为啥do不用过去式

What do they do last night为啥do不用过去式
What did they do last night 该用did

用DID答案错了吧

肯定要用过去时,What did they do last night?

应为:What did they do last night?他们昨晚干什么了? (last night昨晚,过去时间一定要用过去式。)
或What do they do?他们是干什么的?