题目内容

.(2010·湖南岳阳一中高三第二次月考)34. A survey _______ in 2002 by the Computer Security Institute, a private organization in the USA, showed that 90 percent of the 503 biggest companies and government departments questioned _______ their security systems _______ into in the previous year.

A. conducted ; had ; broke              

B. conducted; had had ; broken

C. was conducted ; had had ; broken      

D. to be conducted; had ; broke

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