________ exciting news! We've never had ________ long vocation before.A.What, such aB.What an, such aC.How, such aD.What, so a
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A解析考查感叹句和特殊用法。句意为：多么令人兴奋的消息呀！我们以前从来没有过如此长的假期。感叹句的引导词有两个：what或how，它们的用法是what+a (an)+形容词+名词！how+形容词+a (an)+名词！因此可知应该用what引导；so+形容词+a (an)+名词；such+a (an)+形容词+名词，因此选A。D项干扰性最强。