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— Could you tell me something about the ...

— Could you tell me something about the virus, Dr. Smith ?

— Sure. It _____ via the bloodstream and causes ill health in a variety of organs.

A. concentrates    B. accumulates    C. circulates    D. accelerates

 

C 【解析】 考查动词词义辨析。A. concentrates集中;B. accumulates累积;C. circulates传播、循环;D. accelerates加速。句意:——Smith医生,你能告诉我一些有关这种病毒的情况么?——当然,它通过血液循环,从而导致各种器官的不健康。根据句意可知,此处是说病毒通过血液循环,故C项正确。  
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