What should I do if a client asks for free work as part of the proposal process?

[Btaliat]

Clients can be funny a time. Most clients can even go as far as asking for free works from freelancer. Freelancers, that dont know ways around this may not know the next thing to do. But in actual sense, it is better for the freelancers to ask why they need to do free works before then can be used. What happens to some percentage of the money to be paid and other options that will be of benefits to both parties.