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Write the verbs in brackets in the past continuous or simple

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Write the verbs in brackets in the past continuous or simple past tense.
1.We felt guilty about the old car because while we ____ (drive),we ____ (pollute)our city .
2.While we ____ (stay)at the Magic Hotel,my dad ____ (see)sea horses for the first time.
3.We ____ (not have)air conditioners in our house,because we ____ (save)energy.
were driving ,polluted
were staying,saw
didn‘t have,were saving