111.   What can be done to prevent people trying to enter the country from dying?

112.   What can hockey do to prevent it?

113.   What can I do to prevent further deterioration?

114.   What can I do to prevent the peeling?

115.   What can I do to prevent this ad from appearing?

116.   What could she have done to prevent this?

117.   What is being done to prevent problems?

118.   What is this, in language I can understand, and is there anything I can do to prevent it from happening?

119.   What might be done to prevent such re-clogging of the artery?

120.   What should we do to remove these stains and what can we do to prevent this from happening again after we re-stain the house this spring?