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Whenfirst______tothemarket,theseproductsenjoyedgreatsuccess.选项:a、introducingb、introducedc、introduced、beingintroduced
题目内容：
When first ______ to the market,these products enjoyed great success.
选项:
a、introducing
b、 introduced
c、 introduce
d、 being introduced优质解答
b、 introduced
因为不能自己引入,所以是被动
选项:
a、introducing
b、 introduced
c、 introduce
d、 being introduced
优质解答
因为不能自己引入,所以是被动
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