改否定回答:Mr Wang had at seven o‘clock(怎么做)急!

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改否定回答:Mr Wang had at seven o‘clock(怎么做)急!
改否定回答:Mr Wang had at seven o‘clock(怎么做)急!

改否定回答:Mr Wang had at seven o‘clock(怎么做)急!
在had后加not.请尽快采纳.