题目内容

【题目】

A.Their parents.B.Their grandparents.C.DNA.

【答案】C

【解析】

【原文】

W: We learned about DNA this morning. It is interesting.

M: Yes. Everyone has unique DNA. But it repeated patterns from your parents.

W：Your grandparents are related to you, too.

Question 13：What are they talking about?

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