In the mid-1970’s, since birds were overcome by pollution, and routinely falling from the sky above Los Angeles freeways, this prompted officials in California
to devise a plan that reduced automobile emissions.
A.since birds were overcome by pollution, and routinely falling from the sky above Los Angeles freeways, this prompted officials in California
to devise a plan that reduced
B.same as A
C.birds had been overcome by pollution and routinely fell from the sky above Los Angeles freeways, prompting officials in California
to devise a plan that reduced
D.birds overcome by pollution routinely fell from the sky above Los Angeles freeways, prompting officials in California
to devise a plan to reduce
E.birds overcome by pollution and routinely falling from the sky above Los Angeles freeways, were prompting officials in California
to devise a plan to reduce
这道题的答案是D，overcome 在这里是做分词修饰birds的吗？请NN指教 作者: pfullsomer 时间: 2011-1-6 21:02
