By, in or on?
1) they often travel car.
2) i don’t like to go a train.
3) you can buy a ticket and go a bus.
4) they often go foot.
5) people go to work car.
6) it is nice to go a taxi.
7) i have never travelled a plane.
8) more people now go their cars than trams.
9) they prefer to go bike rather than foot.
10) have you ever gone a train?

They often travel by car. 

I don't like to go in a train.

You can buy a ticket and go on a bus. 

They often go by foot.

People go to work by car.

It is nice to go in a taxi.

I have never travelled on a plane.

More people now go by their cars than on trams.

They prefer to go on bikes rather than on foot.

Have you ever gone on a train?

All of them has the right preposition.