At the airport: How to go through US customs

source:  Learn English with Adam      2014年12月4日

# Do:
--Have all forms completed properly.
--Relax and answer questions quickly, as short as possible.
# Questions: 
--What is your final destination?
--How long will you be staying in the U.S.?
--What is the purpose of your visit?
--Where will you be staying?
--How much currency are you carrying (with you)?
--Who packed your bags?
--Do you have anything to declare?
# hub / transit / random search / secondary questions / ...