GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - DN3A5Y51EV2Z4444X

The skeleton of (i)____________ bird that was recently discovered indicated that this ancient creature (ii)____________ today's birds in that, unlike earlier birds and unlike reptilian ancestors, it had not a tooth in its head. A. a primitive B. preempted C. a contemporary D. anticipated E. an advanced F. differed from