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Câu hỏi:

13/07/2024 459

For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

A. man

B. sweet-smelling

C. using them

Đáp án chính xác

D. or

Trả lời:

verified Giải bởi qa.haylamdo.com

Đáp án C thành “used them”

Giải thích: Ở phía trước động từ đang được chia ở thì hiện tại hoàn thành has created => động từ ở đây cũng như vậy, tuy nhiên ko cần dùng has used nữa, mà chỉ cần dùng used là được.

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