If you have any problems during a trip，you should ______. 选择一项： A. ask for a refund B. change your itinerary C. call the booking office D. return the ticket to the office

If you have any problems during a trip，you should ______.

选择一项：
A. ask for a refund
B. change your itinerary
C. call the booking office
D. return the ticket to the office

出自：广东开放大学大英B（本22秋）

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