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

For thousands of years, man (A) has created sweet-smelling (B) substances from wood, herbs, and flowers and using them (C) for perfume or (D) medicine. A. man B. sweet-smelling C. using them

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For thousands of years, man (A) has created sweet-smelling (B) substances from wood, herbs, and flowers and using them (C) for perfume or (D) medicine

man

sweet-smelling

using them

or

Giải thích

Đáp án C

Sửa using them -> used them