15 Đề ôn thi thpt Quốc Gia môn Tiếng Anh có lời giải chi tiết (Đề số 7)

For thousands of years, man has created sweet-smelling substances from wood, herbs

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Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions.

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

man

sweet-smelling

using them

or

Giải thích

Đáp án C

Using them => used them