The bag was so heavy that she couldn’t carry it upstairs.18/21The bag was so heavy that she couldn’t carry it upstairs.The bag was too heavy for her to carry it upstairs.The bag was so heavy for her to carry upstairs.The bag was heavy enough for her to carry upstairs.The bag was too heavy for her to carry upstairs.Giải thíchĐáp án đúng: D Dịch: Cái cặp quá nặng cho cô ấy để cầm lên trên tầng.