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If I         long enough to have a job, I would choose to be a doctor,      those AIDS patients．
A．had lived; helpingB．should live; help
C．were to live; helpingD．should have lived; help
C

試題分析：考查虛擬語氣和伴隨狀語：句意：我要是活得足夠長時間可以做個工作，我會選擇做一個醫(yī)生，幫助那些艾滋病人。因為主句是would do表示和將來相反的虛擬語氣，從句可以是should do或were to do，第一空排除AD，第二空應(yīng)該是現(xiàn)在分詞做狀語，排除BD，選C。
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