_________that developed countries want to limit the development of the developing countries in the climate conference in Copenhagen.
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
The money collected should be made good use __________ the people who suffered a lot in this terrible earthquake.
Between the two generations, it is often their different views of life and value _______ cause family conflicts.
_________ a certain doubt among the people as to the practical value of the project.
The hours ________ the children spend in their one way relationship with television people undoubtedly affect their relationships with real-life people.