It was easy for this home robot to clean the floor ->this home robot could …

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1. It was easy for this home robot to clean the floor

   ⇒This home robot can wipe the floor 

   Cấu trúc : S+O+V

   *ht

   *Xin ctlhn

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2. This home robot could clean the floor

   S+could/couldn’t+ V

   #TNT

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