题目内容
Chinese Vice-Premier called on Thursday for______ all-out effort to ensure ______ food and drug safety.
A. an; a B. an; 不填 C. the; the D. 不填; the
B
解析:考查冠词。an all-out effort意为 “全方面的努力”, effort前面要冠词,如:make an effort;food and drug safety译作“食品与药物安全”,是泛指,不需要冠词。
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