1When you arrive at the airport, you have to go through customs before you can collect your luggage.
2The customs officer asked me to open my suitcase and show him what was inside.
3The company had to pay a lot of money in customs duties on the goods they imported from abroad.
4If you are bringing goods worth more than a certain amount into the country, you have to declare them at customs.
5The customs agency is responsible for preventing the smuggling of illegal goods into the country.