题目内容
21、When first to the market, the products enjoyed great success．
A．introducing B．introduced C．introduce D．being introducing
试题答案
21、B
When first to the market, the products enjoyed great success．
A．introducing B．introduced C．introduce D．being introducing
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
When first ________ to the market, these products enjoyed great 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
When first ________ to the market, these products enjoyed great success．
A．introducing
B．introduced
C．introduce
D．being introduced
When first ________ to the market, these products enjoyed great success．
introducing
introduced
introduce
being introduced
When first _________ to the market, these products enjoyed great success．
introducing
introduced
introduce
being introduced
When first _________ to the market, these products enjoyed great success．
introducing
introduced
introduce
being introduced