一道高中英语题分别在以下四个场景中结合短语用其中一个造句。场景 the airport。 on a train。when

You are not allowed to bring any weapons to the airpot.
You are allowed to eat and sleep on a train.
When you leave the country you are required to show your passport.
It is forbidden to eat during classes at school.

1We are allowed to board the plane at the airport。2Passangers are not allowed to smoke on a trian。3You require to bring some suveniers when you leave the country。4Pupils are forbidden to chasing after girls at school。