One of the holes of the fossil record is the absence of well-preserved birdOne of the holes of the fossil record is the absence of well-preserved bird feathers from the period that is likely_______with the mass extinction of dinosaurs.A.to end B.to be ending C.to have ended D.to be ended.请解释一下 .谢谢.
问题描述：
One of the holes of the fossil record is the absence of well-preserved bird
One of the holes of the fossil record is the absence of well-preserved bird feathers from the period that is likely_______with the mass extinction of dinosaurs.
A.to end B.to be ending C.to have ended D.to be ended.
请解释一下 .谢谢.
答