The pronoun "they" in paragraph 2 refers to__________.

Câu hỏi :

The pronoun "they" in paragraph 2 refers to__________.

A possibilities for genetic deficiencies         

B cases of genetic deficiencies

C discoveries concerning hereditary mechanisms    

D effects of genetic engineering misuse

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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