If ____unsolved, the problem of food safety may lead to more serious results.
A．leftB．makingC．remainedD．taking
A
    
試題分析: A剩下，B使，制造；C保留，剩下；D帶走。由結(jié)構(gòu)可知此處是非謂語做狀語，句子主語problem和動(dòng)詞之間是被動(dòng)關(guān)系，應(yīng)該用過去分詞，故排除B、D選項(xiàng)；而remain是不及物動(dòng)詞，不能用過去分詞表示被動(dòng)，故答案選A。短語“l(fā)eave+賓語+賓補(bǔ)”表示使某人或者某物處于某種狀態(tài)。句意：如果食品安全問題留下不去解決，那么它將造成更多的嚴(yán)重后果。
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