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With the development of science, more new technology         to the field of IT.
A.has introducedB.is being introduced
C.is introducedD.was introduced
B

试题分析:句意,随着科技的发展,更多新的技术被引进到IT领域。表示现阶段正在进行的动作,用现在进行时。且主语new technology与动作introduce之间是被动关系,用现在分词的被动语态,故选B。
点评:动词是谓语动所表示的动作或情况发生时间的各种形式。英语动词有16种时态,但是常用的只有9种:一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成时、过去将来时、现在完成进行时。当句子的主语是动作的执行者时,谓语的形式叫主动语态。句子的主语是动作承受者时,谓语的形式叫被动作语态。被动语态由助动词be + 过去分词构成,时态通过be 表现出来。
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