We _______(not have)air conditioners in our old house,because we ______(save) energy.

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We_______(nothave)airconditionersinouroldhouse,becausewe______(save)energy.We_______(nothave)aircond

We _______(not have)air conditioners in our old house,because we ______(save) energy.
We _______(not have)air conditioners in our old house,because we ______(save) energy.

We _______(not have)air conditioners in our old house,because we ______(save) energy.
don't have.are saving,前者表示没有,后者save去e加ing表示正在进行时

We __don't have_____(not have)air conditioners in our old house,because we ___are saving___(save) energy.