Humans have done great advances in technology at the expense

Câu hỏi :

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
Humans  have done great advances in technology at the expense of the environment.

A.have done

B. at the expense

C. advances

D. humans

* Đáp án

* Hướng dẫn giải

Đáp án là A. have done => have taken

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