While __________the sun,the satellite has sent more than four billion bits of information back to the earth.A:having orbited B:being orbited C:having been orbited D:orbiting 【求详解,很难】

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While__________thesun,thesatellitehassentmorethanfourbillionbitsofinformationbacktotheearth.A:having

While __________the sun,the satellite has sent more than four billion bits of information back to the earth.A:having orbited B:being orbited C:having been orbited D:orbiting 【求详解,很难】
While __________the sun,the satellite has sent more than four billion bits of information back to the earth.
A:having orbited
B:being orbited
C:having been orbited
D:orbiting
【求详解,很难】

个人觉得选C
因为后面satellite has sent，用了has，已经，说明satellite还在继续环绕太阳转。
所以要用过去完成进行时，排除BCD，完成进行时表达式是have been doing/ have been P.P
又因为非谓语动词做状语，所以have要加ing
如果没有has，选D也可以，我在CD之间徘徊了一下...

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个人觉得选A
首先，主语是satellite
而orbit是绕。。。运行
比如The earth orbits the sun.
地球绕着太阳运行。
所以不用被动，BC排除，在AD里选
而卫星传送40亿b的信息回地球是在orbit动作之后
所以要用完成时
不知道对不对，呵呵

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