题目内容
2．-Have you heard about the event of vaccine（疫苗）？-Yes．It has caused a（n） _________ influence on medicine safety．（ ）
| A． | active | B． | common | C． | medical | D． | unexpected |
分析 --你听说过疫苗事件吗？
--是的，它对医药安全造成了意想不到的影响．
解答 答案：D．考查形容词．句意"--你听说过疫苗事件吗？--是的，它对医药安全造成了意想不到的影响．"．A积极的．B普通的．C医学的．D想不到的．结合语境"你听说过疫苗事件吗？是的，它对医药安全造成了_____影响．"，可知，应该是"意想不到的"，选D．
点评 形容词的种类有很多，要根据具体语境选择适当的形容词．抓住关键词语，分析用法，完成试题．
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