Question 20
A、Learn the local customs.
B、Make hotel reservations.
C、Book tickets well in advance.
D、Have the right documents.
Q: What is the most important thing to do when you prepare for your trip abroad?
详解：短文提到在准备出国旅游时，首先一定要确保文件正确，谁都不想到了目的地却发现签证错误、护照过期等情况。选项D）中的 documents 与文中的paperwork 同义，故D为答案。
A、Learn the local customs.
B、Make hotel reservations.
C、Book tickets well in advance.
D、Have the right documents.
Q: What is the most important thing to do when you prepare for your trip abroad?
详解：短文提到在准备出国旅游时，首先一定要确保文件正确，谁都不想到了目的地却发现签证错误、护照过期等情况。选项D）中的 documents 与文中的paperwork 同义，故D为答案。