Insert articles where necessary.

Don’t you see … reason?
There is no … guide in … coach.
There are some … tables in the office.
What do … travel agencies do?
… First travellers were … merchants.
Everybody will enjoy … water tourism.
Did you use to work in … summer?
This … travel company has … outlet at … factory.
… Tour operators publish … colourful travellogues.
Licenses give … free – lancers … permission to work.