Shanghai is the first city in the world a high-speed maglev train, from the city to Pudong Airport.
A. to build
B. to be built
C. to have built
D. to have been built
网友回答
A. to build
B. to be built
(答案→)C. to have built
D. to have been built
解析：本题主要考查不定式各种形式的意义和用法。根据句子的逻辑关系，上海是修建磁力悬浮列车的执行者，不能用被动形式，根据句子的意思，不定式的动作发生在谓语动词的动作之前。