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