--- When can I see the doctor, madam?
--- Let me see. Sorry, you ___________ your turn, so you will have to wait again.
A．a(chǎn)re missingB．have missedC．will missD．missed
B

試題分析：句意：夫人，我什么時候能看到醫(yī)生？——讓我看看，抱歉，你錯過了輪到你的時機，一次再排隊吧！結(jié)合語境可知下文描述的是現(xiàn)在已經(jīng)完成的動作，故用現(xiàn)在完成時態(tài)，主語you是第二人稱，故助動詞用have，選B。
點評：英語中的時態(tài)主要是借助于時間狀語與上下文語境來進行判斷。解答此類題型，首先要注意句子中的時間狀語，如果沒有則要通過分析上下文，結(jié)合語境來判斷句子的時態(tài)。英語疑問句中一般具有時態(tài)上的對應(yīng)關(guān)系，注意結(jié)合這一特點進行區(qū)分。
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