---- Is there a vaccine _____ pig influenza?, I’m anxious to know. -----Don’t worry, there is a vaccine _____ for pigs against pig influenzaA.for; availableB.against ; useC.to; accessD.against; available
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C解析C考查考查介词和形容词短语作定语的用法。句意：有治疗猪流感的疫苗么？我非常想知道，不要担心，现在有防止猪感染猪流感的疫苗。available可利用的,against反对符合句意。