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An investigation was made into the accident, ______ fifty people were killed.

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the investigation of the life cycle of a protozoon is pure research.  applied investigation is looked down upon in modern society.  the discovery of X-rays was made in applied research.  the common classification of research is neither accurate nor impersonal.  
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.  
at which the results  the results on which  of whose results  whose results  
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.  
the investigation of the life cycle of a protozoon is pure research.  applied investigation is looked down upon in modern society.  the discovery of X-rays was made in applied research.  the common classification of research is neither accurate nor impersonal.  
temperature  viscosity  lever  level  
the investigation of the life cycle of a protozoon is pure research.  applied investigation is looked down upon in modern society.  the discovery of X-rays was made in applied research.  the common classification of research is neither accurate nor impersonal.  
experiment  research  examination  investigation  
the investigation of the life cycle of a protozoon is pure research.  applied investigation is looked down upon in modern society.  the discovery of X-rays was made in applied research.  the common classification of research is neither accurate nor impersonal.  
perfection  improvement  investigation  adoption  
research workers follow unexpected, interesting clues.  scientists make a discovery first, and then try to use it.  it is the man rather than the project who is given support.  results of practical value are to be achieved.  
taken up    made up    came up    turned up  

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