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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

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

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

 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

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