A horse is useful animal. A. a B. an C. the D. /——青夏教育精英家教网—

摘要： A horse is useful animal. A. a B. an C. the D. /

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A horse is _______ useful animal.

A. a B. an C. the D. /

A horse is _______ useful animal.

A. a B. an C. the D. /

A horse is _______ useful animal.

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