Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the cor...Đoạn văn27/40What is the reading mainly about?The tunnels under Paris and the people who explore them.How the recent discovery of Paris's tunnels is changing the city.Why tunnels will someday be Paris's newest tourist attraction.Why tourists know so little about Paris's tunnels.Giải thíchĐáp án C