单选题
Japanese drag and hospital companies kept selling tainted blood ______.
A、
at the time when Japanese government required that untreated blood was forbidden to be imported from abroad
B、
when it was sure HIV virus was a great threat to human beings
C、
because there was an emergent need for blood in treating hemophiliacs
D、
as tile Health and Welfare ministry made an unanimous recommendation on the imports of blood products
【正确答案】
D
【答案解析】
A项错误；因为日本政府最终并未接受禁止进口的建议；B，C项在文中都未提到；只有D项符合原文。
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