For some time now, world leaders _____ out the necessity for agreement on climate change, the world economy and African development.
Fruit juices can be harmful ___ children’s teeth.
--Have you fed the dog?---No, but ____.
The farmers were more anxious for rain than the people in the city because they had more ______.
As is often pointed out, knowledge is a two-edged weapon which can be used ______ for good or evil.
Heavy drinking used to be acceptable, but as drunken driving has caused so many tragedies public opinion is no longer ______.