試題詳解

25. According to the passage you have read, which of the following does the tour guide advise ?
(A) Walking on the tracks or skating on the escalators is not prohibited.
(B) Children are not allowed to board the Metro when it comes.
(C) Passengers who want to get off the Metro should wait till all the passengers who want to board the Metro finish boarding.
(D) Standing too close to the edge of the train platform is dangerous.