Bài tập Tìm sửa lỗi sai có đáp án Phần 1

I surprised how easy it was to use a computer. I thought it would be more difficultly

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I surprised how easy it was to use a computer. I thought it would be more difficultly.

        A                         B                                                   C                 D

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Đáp án đúng là: D