摘要：The World Health Organization gave a warning to the public without any when the virus of H1N1 hit Mexico in April. 2009. A.delay B.effort C.schedule sideration 解析:考查名词词义辨析.句意:当H1N1型病毒于2009年4月袭击墨西哥时.世界卫生组织立刻向人们发出了警告. delay耽搁.延误,effort努力,schedule时间表,consideration考虑.体谅.关心. 答案:A

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