21.   What, Lay wondered, could be done to ensure that Enron never was in that position again?

22.   What can I do to ensure that all the files have been purged?

23.   We will talk to herpes B experts about what more could be done to ensure worker safety.

24.   What will you do to ensure the sustainability of those profits?

25.   With the old methods shot down in the courts, what can be done to ensure diversity without talking about race?

26.   A lot more should to be done to ensure that they do not slip into a wretched existence in the last few years of their lives.

27.   After the chlorination is finished, new tests will be done to ensure the bacteria are gone.

28.   Berry praised Florida lawmakers for the changes, but said more must be done to ensure access, bilingual help for voters and an end to purging legitimate voters.

29.   Both Aznar and Kohl repeatedly expressed their confidence in the future of the currency but added that work deeded to be done to ensure it is sustainable.

30.   But he said more should be done to ensure that progress is sustainable.