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The scientific research says that whales use sound to     with each other.

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contribute to    pay attention to    refer to    led to  
Because they don’t want to be bothered with those basic researches.  Because national governments take them as their sole preserve.  Because member countries want to keep the benefits to themselves.  Because scientist from the member countries couldn’t compete.  
took  assigned  arranged  committed  
there have been decreased returns in the research of fundamental science  there are too many important things for scientists to study  applied science and engineering take up too much time and energy  today’s scientists are not as intelligent as those in the past  
Because they don’t want to be bothered with those basic researches.  Because national governments take them as their sole preserve.  Because member countries want to keep the benefits to themselves.  Because scientist from the member countries couldn’t compete.  
it is a kind of prearranged investigation.  no new knowledge can arise from applied research.  it is more difficult to get results in applied research.  no specific scientific ability is needed in applied research.  
hardworking  social  basic  scientific  
certain areas in pure research are not fully explored.  applied investigation requires greater scientific ability.  applied research is inferior to pure research.  knowledge is useless unless it is put into practice.  
it provides an easier access to scientific results.  it brings huge profits to scientific researchers.  it emphasizes the crucial role of scientific knowledge.  it facilitates public investment in scientific research.  
He is depressed because of the ignorance of scientists.  He is doubtful because of the enormous difficulties in scientific research.  He is confident though he is aware of the enormous difficulties in scientific research.  He is delighted because of the illuminating scientific findings.  

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