__________,they provide a rapid means of getting information about many people.A.Properly be used B.Properly used C.If use it properly D.Been properly used 原因要讲清楚
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![__________,they provide a rapid means of getting information about many people.A.Properly be used B.Properly used C.If use it properly D.Been properly used 原因要讲清楚](/uploads/image/z/7451496-0-6.jpg?t=__________%2Cthey+provide+a+rapid+means+of+getting+information+about+many+people.A.Properly+be+used++++B.Properly+used++++C.If+use+it+properly++++D.Been+properly+used++++%E5%8E%9F%E5%9B%A0%E8%A6%81%E8%AE%B2%E6%B8%85%E6%A5%9A)
__________,they provide a rapid means of getting information about many people.A.Properly be used B.Properly used C.If use it properly D.Been properly used 原因要讲清楚
__________,they provide a rapid means of getting information about many people.A.Properly be used B.Properly used C.If use it properly D.Been properly used 原因要讲清楚
__________,they provide a rapid means of getting information about many people.A.Properly be used B.Properly used C.If use it properly D.Been properly used 原因要讲清楚
选c.这里面省略了主语They,因为后面有they,所以可以省略.然而一个句子不能有两个动词,所以A不选.B中把他省略的东西补上就是It is properly used.主语是it 与后面的主语不一样,不能省.没有D这种用法
B. 非谓语结构,相当于省略了If they are ,A项be应该省去,C 前后主语不一致,if引导的主语是人,而后半句主语是物(they)D项应该是being properly used