when we go through the immigration

Then the most important thing that you can do when going through customs at the U.S. airport is speaking fluent English.

When you go through customs control, if you have something to declare, you’d go through the “red channel”; if you have nothing to declare, you’d go through “green channel”.( )

When an international passenger _____ at a country, he must go through the customs formalities. A: is arriving B: arrives C: will arrive D: arrive

The sentence “When in Rome, do as the Romans do” means that _______. A: we should learn from the Romans B: we should work as the Romans do C: we should obey its customs when we are entering a country. D: we have been Romans