The chairman of the company said that new techniques had ________ improved their pro duction efficiency.

A．forceful
B．severe
C．intense
D．aggressive

A．the emotional origin of the war in Ireland is lost in time
B．historically, we have created an "us" versus "them" society
C．humans have had a natural disinclination toward formal grouping
D．the First World War is an example of how man has always avoided domination