15000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 1)

Mary knew how busy I was. She offered to help me. A. Because Mary knew my business, she offered to help me. B. Knowing how busy I was, Mary offered to help me. C. Mary knew how I was bus

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Mary knew how busy I was. She offered to help me.

Because Mary knew my business, she offered to help me.

Knowing how busy I was, Mary offered to help me.

Mary knew how I was busy and offered to help me.

Having known how busy I was, Mary offered to help me.

Giải thích

Đáp án C