摘要：15．When first to the market, these products enjoyed great success. A．introducing B．introduced C．introduce D．being infroduced
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When first____ to the market, these products enjoyed great success.
A．being introduced B．having introduced C．introduced D．introducing
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When first _____ to the market, these products enjoyed great success.
[ ]
A．introducing B．introduced
C．introduce D．being introduced
查看习题详情和答案>>When first ________ to the market, these products enjoyed great success.
[ ]
A．introducing
B．introduced
C．introduce
D．being introduced