The word they in the first sentences of the third paragraph refers to________.

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

A. chips

B. tissues

C. voltages

D. researchers

* Đáp án

D

* Hướng dẫn giải

Đáp án D.

Key words: they. first sentences, third paragraph, refers

Clue: Researchers hope that eventually they will be able to develop more advanced chips whereby they can choose a particular voltage to activate particular tissues …"

Vậy ta chọn đáp án D. researchers.

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