9．I have to see the doctor because I        a lot lately．（　�。�
A．have been coughingB．had coughed
C．coughedD．cough

分析 句意：我不得不去看醫(yī)生了，因為我最近咳嗽得很厲害．

解答 答案A．句中時間副詞"lately"通常與現(xiàn)在完成時連用，排除B、C和D項．分析句意"have to see a doctor"可知，咳嗽"cough"這個動作在過去已開始，一直持續(xù)到現(xiàn)在，還有可能會持續(xù)下去．因此用現(xiàn)在完成進行時，A項符合語境，故選A．

點評 .本題考查時態(tài)的用法．解答此類題目的關(guān)鍵是要讀懂句意，分析上下文的語境，判斷時態(tài)，鎖定答案．

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