More and more vehicles using cheap fuel，declared scientists at the con-考呗网

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单选题More and more vehicles using cheap fuel，declared scientists at the conference，have left Bangkok’s children with body lead levels the world highest．

参考答案：C进入在线模考

本句意为：科学家们在会议上宣称，(泰国首都)曼谷有越来越多的车辆使用廉价的燃料，使得那里儿童体内的铅含量成为世界(几个)最高(中的一个)。因为the highest在本句中作宾语补足语，且曼谷不是唯一的儿童体内铅含量高的城市，因此应用among the world’s highest，C为答案。

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