题目内容
2.A simple 45-minute operation by scientists is hoped to cure blindness in six years.( )A. | being developed | B. | developed | C. | to develop | D. | developing |
分析 科学家们正在改进的一种四十五分钟的简单手术有望治愈六年以内的失明.
解答 答案:A
题干中develop作operation的后置定语,要用非谓语动词;develop与operation之间构成动宾关系,要用被动;句意表达的是正在进行的动作,要用分词的进行式.故选A.
点评 现在分词是非谓语动词的一种,表达主动或进行;过去分词表达被动或完成;动词不定式表达未发生的动作.学习时,要注意区分和掌握.

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