Inwentors have changed the way we live.---So they are fanous for the great things they _____A.doB.didC.are doingD.had done

Inwentors have changed the way we live.---So they are fanous for the great things they _____A.doB.didC.are doingD.had done
Inwentors have changed the way we live.---So they are fanous for the great things they _____
A.do
B.did
C.are doing
D.had done

Inwentors have changed the way we live.---So they are fanous for the great things they _____A.doB.didC.are doingD.had done
inventor famous 单词打错了.
应该选D

D 时态 前面的句子用的是完成时 后面的那个空因为产生了影响所以用过去完成时