Question

It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.

A．process

B．attention

C．measure

D．part

Answer 1

D. part.

take part in参加。
本题译文：显然，整个世界正经历着一场社会革命；科学家和技术人员必定是这场革命地主要参加者。