Câu hỏi:
05/06/2020 8,973I was very busy lately since the project of designing the new collection started.
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
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Trả lời:
Đáp án: A thành “have been”
Giải thích: Hiện tai hoàn thành + since + quá khứ đơn.
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For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.
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