问题
单项选择题
More and more vehicles using cheap fuel, declared scientists at the conference, have left Bangkok's children with body lead levels the world highest.
A．in the world highest
B．in the world's highest
C．among the world's highest
D．among the highest of world
答案
参考答案：C
解析： 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。