When first to the market, these products enjoyed great success. A introducing B introduc——青夏教育精英家教网—

摘要： When first to the market, these products enjoyed great success. A introducing B introduced C introduce D being introduced

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When first______ to the market, these products enjoyed great success. （04全国II）

　　　 A introducing　　 B introduced　　 C introduce　 D being introduced

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