. --- My son is addicted to drugs. He isn’t hopeless, is he?
--- Yes, ______ he mends his way and starts all over.
    A. if  
     B. when         
    C. even if            
D. unless
D
這題考查連詞，句意是：--我兒子吸毒，他沒有希望了，是嗎“—是，除非他改邪歸正重新開始。選D。
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