invertors have changed the way we live.so they are famous for the great thin

invertors have changed the way we live.so they are famous for the great thin

题目
invertors have changed the way we live.so they are famous for the great thin
答案
原题是一道选择题,如下:Inventors have changed the way we live.So they are famous for the great things they___.A.do B.did C.are doing D.had done前一句用的是现在完成时,所以后面就一定用过去时态答应应该选...
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