单项选择题
Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
According to the speaker, what is one advantage of the maglev(). A. It is more comfortable than a conventional train.
B. It doesn’t require very much track maintenance.
C. It doesn’t remain in any station very long.
D. It carries more passengers than a conventional train.