I travel by...
plane
Is this a mountain?
Yes, this is.
What is that?
That's a train
_______ are motocycle. (these/this)
These
________ is a tractor. (that/those)
That
Is that a river?
Yes, that is.
I go to work by...
car
What is this?
This is a boat
I go to school by...
bus
I go to the park by...
bike