Twenty million years ago, our immediate ancestors probably still lived in the trees. After we came (451) from the trees, we evolved an uprtght 452, our hands were more useful, being (453).We possessed agility and an ex- cellent binocular (454). We had, in course of time, (455) many of the preconditions required for (456) tools. More over, there was now a real (457) in possessing a large brain and (458) communicating complex thoughts. Anyway, other things (459) equal, itis better to be smart 469 to be stupid.

Options

A. was
B. being
C. been
D. are

Answer

B

Explanation

being (Verb)