问题
单项选择题
While having orbited the sun, the satellite has sent more than four billion bits of information back to earth.
A.orbiting
B.to orbit
C.being orbited
D.having been orbited
答案
参考答案:A
解析:[分析] 结构应用本句意为:在绕太阳运行的过程中,那颗卫星向地球发回了40多亿条信息。因为如果从句的主语和主句的主语相同,可把从句省略为分词短语作状语。因此A为答案。