What's this?
It's a lorry
Are they going by motorbike?
Yes, they are
Are they going by car or on foot?
They're going on foot
What's this?
It's a hot-air balloon
They're going by .....
train
Do you go to school on foot?
Yes, I do/No, I don't
Is she going by bike?
Yes, she is
How do you go to school?
I go to school on foot/I go to school by car
Are they going by lorry?
No, they aren't
They're going by ......
taxi
Is this a bike or a tandem?
It's a tandem
What's this?
It's a helicopter
Are they going by plane or by helicopter?
They're going by plane
Are they going by boat?
Yes, they are