________, sheep were then used for wool. A. Having first domesticated for milk production B. Having been first domesticated for milk production C. Because they had been first domesticat

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________, sheep were then used for wool.

Having first domesticated for milk production

Having been first domesticated for milk production

Because they had been first domesticated for milk production

Although they had first domesticated for milk production

Giải thích

Đáp án B

A sai vì câu chủ động

C, D sai từ nối, sai nghĩa của câu