单项选择题

Task 5 
Directions: The following is a  reception plan. After reading it,you are required to answer each of the five questions( No. 66 to No. 70) in no more than three words.  The answers are required to be written after the corresponding numbers on the Answer Sheet. 

How will the tourists get to Guilin on the morning of the 6th day They will get there by  ()