When first _______ to the market, the products didn’t attract much attention.A．i

题干

When first _______ to the market, the products didn’t attract much attention.

A．introducing	B．introduced
C．was introduced	D．being introduced

上一题下一题 0.4难度单项选择更新时间:2014-12-16 07:26:05

小学学科试题库

初中学科试题库

高中学科试题库