(2011·北京高考)It's important for the figures regularly.
A. to be updated
B. to have been updated
C. to update
D. to have updated
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(答案→)A. to be updated
B. to have been updated
C. to update
D. to have updated
解析：选A 考查非谓语动词。句中的时间状语regularly 表示经常发生，因此排除B、D两项； 又因为figures 是被更新的，故选A项。