I ＿＿ when she knocked at the door.A.cook B.cooks C.was cooking D.am cooking

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• I ＿＿ when she knocked at the door.A.cook B.cooks C.was cooking D.am cooking
• I ＿＿ when she knocked at the door.A.cook B.cooks C.was cooking D.am cooking
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