15．Have you ever seen a doctor？If ______，what happened？（　　）
A．anyB．everC．notD．so

分析 你看過醫(yī)生了嗎？如果看過了，有什么問題嗎？

解答 答案：D．what happended是看過醫(yī)生才能知道的問題，因此句意為如果看過了，故選D，if so為如果這樣的話．A．if any如果有任何問題（事情），B．if ever如果曾經(jīng)有（做過），C．if not如果沒有的話，故選D．

點(diǎn)評 本題考查連接副詞的用法，根據(jù)句意使用合適的連接副詞．

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