og2022 864题的一个困惑

7MX

864. Dinosaur tracks show them walking with their feet directly under their bodies, like
mammals and birds, not extended out to the side in the manner of modern reptiles.


A. Dinosaur tracks show them walking with their feet directly under their bodies, like
B. Dinosaur tracks show that they walked with their feet directly under their bodies, as do
C. Dinosaurs left tracks that showed them walking with their feet directly under their
bodies, like
D. The tracks that dinosaurs left show that they walked with their feet directly under their
bodies, as do
E. In the tracks they left, dinosaurs are shown walking with their feet under their bodies,
like
答案是d
想问问各位d选项中do 为什么不用did呢 不是和walked属于比较平行结构咩 谢谢大家！！